43 results on '"Rodrigues, Maria de Lurdes de Azevedo"'
Search Results
2. Physiological alterations in Bradybaena similaris (Stylommatophora: Bradybaenidae) induced by the entomopathogenic nematode Heterorhabditis indica (Rhabditida: Heterorhabditidae) strain LPP1
- Author
-
Tunholi, Victor Menezes, Monteiro, Caio Oliveira, Cristina da Silva, Lidiane, Dolinski, Claudia de Melo, José dos Santos, Marcos Antônio, Rodrigues, Maria de Lurdes de Azevedo, Bittencourt, Vânia Rita Elias Pinheiro, Pinheiro, Jairo, and Tunholi-Alves, Vinícius Menezes
- Published
- 2014
- Full Text
- View/download PDF
3. Aerobic to anaerobic transition in Biomphalaria glabrata (Say, 1818) infected with different miracidial doses of Echinostoma paraensei (Lie and Basch, 1967) by high-performance liquid chromatography
- Author
-
Tunholi, Victor Menezes, Tunholi-Alves, Vinícius Menezes, Lustrino, Danilo, Castro, Rosane N., Sant’Ana, Luiza D’Oliveira, Garcia, Juberlan Silva, Maldonado Jr, Arnaldo, dos Santos, Marcos Antônio José, Rodrigues, Maria de Lurdes de Azevedo, and Pinheiro, Jairo
- Published
- 2013
- Full Text
- View/download PDF
4. Influence of Echinostoma paraensei (Lie and Basch, 1967) infection on the calcium content in Biomphalaria glabrata (Say, 1818)
- Author
-
Tunholi, Victor Menezes, Lustrino, Danilo, Tunholi-Alves, Vinícius Menezes, Garcia, Juberlan Silva, Mello-Silva, Clélia Christina Corrêa, Maldonado, Arnaldo, Jr., Rodrigues, Maria de Lurdes de Azevedo, and Pinheiro, Jairo
- Published
- 2011
- Full Text
- View/download PDF
5. Lipid levels in Biomphalaria glabrata infected with different doses of Echinostoma paraensei miracidia
- Author
-
Tunholi-Alves, Vinícius Menezes, Tunholi, Victor Menezes, Gôlo, Patrícia, Lustrino, Danilo, Maldonado, Arnaldo, Jr., Bittencourt, Vânia Rita Elias Pinheiro, Rodrigues, Maria de Lurdes de Azevedo, and Pinheiro, Jairo
- Published
- 2011
- Full Text
- View/download PDF
6. Changes in the reproductive biology of Biomphalara glabrata infected with different doses of Echinostoma paraensei miracidia
- Author
-
Tunholi, Victor Menezes, Lustrino, Danilo, Tunholi-Alves, Vinícius Menezes, Mello-Silva, Clélia Christina Corrêa de, Maldonado, Arnaldo, Jr., Rodrigues, Maria de Lurdes de Azevedo, and Pinheiro, Jairo
- Published
- 2011
- Full Text
- View/download PDF
7. Ausência da atividade anti-helmíntica de plantas em frangos de corte naturalmente infectados com Heterakis gallinarum (Schranck,1788) Madsen,1949
- Author
-
Fernandes Rozeverter Moreno, Rodrigues Maria de Lurdes de Azevedo, Borba Hélcio Resende, Fernandes Maria Zenaide de Lima Chagas Moreno, and Amorim Alziro de
- Subjects
Heterakis gallinarum ,atividade anti- helmíntica ,plantas medicinais e frango ,Agriculture ,Agriculture (General) ,S1-972 - Abstract
Estudou-se a atividade anti-helmíntica das plantas; Allium sativum, Punica granatum, Tynnanthus fasciculatus e Cocos nucifera. Foram utilizados 70 frangos infectados naturalmente com Heterakis gallinarum, divididos em grupos de dez animais, com um controle positivo (20) e um negativo (10). Administraram-se as plantas na forma de extrato aquoso e suco por gavage e trituradas incorporadas à ração nas doses de 2, 3 e 10g kg-1 dia-1, durante três dias consecutivos. Os resultados foram avaliados através de teste não. O A. sativum, P. granatum, T. fasciculatus e C. nucifera eliminaram: 6,70; 4,12; 1,25 e 0,22% , respectivamente. Os percentuais de eliminação do A. sativum e do T. fasciculatus, corresponderam respectivamente a 1/4 e 1/6 do controle positivo, sendo o C. nucifera e o P. granatum semelhantes ao controle negativo. Desta forma, as plantas nas doses empregadas não apresentaram atividade significativa (P
- Published
- 2004
8. Further study of Codiostomum struthionis (Horst, 1885) Railliet and Henry, 1911 (Nematoda, Strongylidae) parasite of ostriches ( Struthio camelus Linnaeus, 1758) (Aves, Struthioniformes)
- Author
-
Ederli, Nicole Brand, de Oliveira, Francisco Carlos Rodrigues, and Rodrigues, Maria de Lurdes de Azevedo
- Published
- 2008
- Full Text
- View/download PDF
9. Experimental infection of Trichuris vulpis in dogs
- Author
-
Vieira, Vivian Suane de Freitas, Pires, Marcos Sandes, Saavedra, Andrea Franco, Figueiredo, Karina Godet, Scott, Fábio Barbour, and Rodrigues, Maria de Lurdes de Azevedo
- Subjects
infecção experimental ,dogs ,ovos ,experimental infection ,cães ,Veterinary medicine ,eggs ,SF600-1100 ,period pré-patente ,pre-patent period ,Trichuris vulpis - Abstract
Freitas Vieira V.S., Pires, M.S., Saavedra, A.F., Figueiredo, K.G., Scott F.B. & Rodrigues M. de L. de A. Experimental infection of Trichuris vulpis in dogs [Infecção experimental de cães com Trichuris vulpis]. Revista Brasileira de Medicina Veterinária, 38(supl. 3): 206-210, 2016. Programa de Pós graduação em Ciências Veterinária, Anexo 1, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, BR 456, km 7, Campus Seropédica 23987-970, Seropédica, RJ, Brasil. E-mail: lurdesar@ufrrj.br Dog is the definitive host of Trichuris vulpis, gastrointestinal nematode that cause the illness known as trichuriasis that depending on the parasitic burden can cause, anorexy, loss of weight, anemia, dehydration and until evolving the death. With the objective to determine T. vulpis by oral inoculation with maximum 1,500 eggs; dogs had been infected with 500, 1,000 and 1,500 larvae eggs. From sixth week after infection, the egg counting was carried through eggs per gram of feces (EPG) of each dog and from 11ª week egg elimination was observed in feces. The first Dog received 500 eggs and did not present eggs in feces; The second dog received 1000 eggs and presented a EPG of 17.150 in 12ª week with oscillations of up to 1,150 in 18ª week. Dog 3 that it received 1,500 eggs presented 50 EPG and reached the maximum of 150 eggs in 28ª week. In this study it can be concluded that the dose of 1.000 and 1.500 eggs of T.vulpis was capable to infect the dogs and that the dose of 1,000 eggs can be indicated to keep the experimental cycle., Os cães são considerados hospedeiros definitivos do nematoide gastrointestinal Trichuris vulpis, que é responsável por causar a tricuríase nesses animais, dependendo da carga parasitária podemos observar como sintomatologia aanorexia, perda de peso, anemia, desidratação, podendo levar inclusive a morte do animal. O presente estudo teve como objetivo estudar o período pré patente de T. vulpis através da infecção oral utilizando como dose infectante até 1500 ovos; cães foram infectados utilizando 500, 1.000 e 1.500 ovos larvados. Após seis semanas de infecção foi realizada uma contagem de ovos por grama de fezes (OPG) em cada um dos cães, onde foi observada a eliminação de ovos nas fezes a partir da 11ª semana. O cão 1, que recebeu uma dose infectante de 500 ovos, não apresentou ovos do parasito em suas fezes; O cão 2, que recebeu 1.000 ovos como dose infectante apresentou um OPG de 17,150 na 12ª semana com oscilações de até 1.500 ovos na 18ª semana. O cão 3, que foi infectado com 1.500 ovos apresentou um OPG de 50 chegando a 150 ovos por grama de fezes na 28ª semana. Através deste estudo, pode-se sugerir que a dose infectante de 1.000 e 1.500 ovos de T. vulpis foi capaz de infectar cães e que a primeira pode ser indicada para manter o ciclo biológico experimentalmente. 
- Published
- 2016
10. Morphological and morphometric study of pre-ovigerous and post-ovigerous adults of Tanaisia (Paratanaisia) bragai (Santos, 1934) (Digenea, Eucotylidae)
- Author
-
D'ávila, Sthefane, primary, Manso, Pedro Paulo de Abreu, additional, Bessa, Elizabeth Cristina de Almeida, additional, and Rodrigues, Maria de Lurdes de Azevedo, additional
- Published
- 2017
- Full Text
- View/download PDF
11. Estudo morfométrico e aspectos taxonômicos de Baruscapillaria obsignata (Nematoda, Capillariidae), parasito de Columba livia (Aves, Columbidae).
- Author
-
D'ávila, Sthefane, primary, Bessa, Elizabeth Cristina de Almeida, additional, and Rodrigues, Maria de Lurdes de Azevedo, additional
- Published
- 2017
- Full Text
- View/download PDF
12. Composition and structure of the helminth community of Columba livia (Gmelin, 1798) (Aves, Columbidae), in the municipality of Juiz de Fora, Minas Gerais state, Brazil
- Author
-
D'ávila, Sthefane, primary, Bessa, Elizabeth Cristina de Almeida, additional, and Rodrigues, Maria de Lurdes de Azevedo, additional
- Published
- 2017
- Full Text
- View/download PDF
13. AVALIAÇÃO DA ADMINISTRAÇÃO ORAL DE Ácido Ursodesoxicólico (AUDC) NO DIAGNÓSTICO DA INFECÇÃO NATURAL POR Platynosomum illiciens EM GATOS
- Author
-
Leal, Paulo Daniel Sant’Anna, Campos, Debora Porretti, Rodrigues, Maria de Lurdes de Azevedo, Botelho, Gilberto Garcia, and Labarthe, Norma Volmer
- Subjects
liver fluck ,trematodiose felina ,Colagogo-colerético ,domestic cats ,Colagogo-choleretic ,felinos - Abstract
Leal P.D.S., Campos D.P., Rodrigues M. de L. de A., Botelho G.G. & Labarthe N.V. [Evaluation of oral administration of ursodeoxycholic acidin the diagnosis of natural infection in cats by Platynosomum illiciens]. Avaliação da administração oral de ácido ursodesoxicólico (AUDC) no diagnóstico da infecção natural por Platynosomum illiciens em gatos. Revista Brasileira de Medicina Veterinária, 33(4):229-233, 2011. Curso de Pós-Graduação de Ciências Veterinárias. Universidade Federal Rural do Rio de Janeiro, BR 465 km 7, Seropédica, RJ 23890-000, Brazil. Email: pauloleal@ctiveterinario.com.br Although infection by feline Platinosomum illiciens is common in Southeastern Brazil, in vivo diagnosis is rare. This disease presents with inflammation and obstruction of the bile ducts and, over time, the host can lead to death. The difficulty in diagnosis by parasitological laboratory results from the fact that eggs are heavy, requiring methods of sedimentation to be found, and its elimination in the feces be intermittent and few in number. So, we decided to evaluate whether a drug with choleretic action and bile duct, characteristic of ursodeoxycholic acid, would increase the concentration of parasite eggs in the feces of infected cats. Therefore, in the first half of 2003, 16 cats from a colony located in the western area of the city of Rio de Janeiro, Brazil, were included, without restriction as to age, gender or medical conditions, although all animals were sick and for the euthanasia by veterinarians responsible. The animals were housed individually for 10 days and, where defecated, a stool sample was collected. All samples were examined by techniques of sedimentation and flotation. On the fifth day after the beginning of the collection of all stool samples received ursodeoxycholic acid (10-15mg/kg) in a single dose. On the 10th day after the collection of stool samples, all animals were euthanized in accordance with the determination of the Federal Council of Veterinary Medicine, followed by autopsy for detection ofeggs and specimens of P. illiciens in the gallbladder and bile ducts. Among the 16 animals, 12 were parasitized by P. illiciens (75%), of which nine adult forms harbored in the liver (56.25%). 10 animals (63%) had eggs in fecal samples and in the gallbladder. The administration of ursodeoxycholic acid did not affect the sensitivity of diagnostic techniques, although the number of eggs in the feces of animals has increased. Stool examination by sedimentation of serial samples, was more sensitive than by flotation., Embora infecções em gatos por Platinosomum illiciens sejam frequentes no sudeste brasileiro, o diagnóstico in vivo é raro. Esta parasitose cursa com inflamação e obstrução dos dutos biliares e, ao longo do tempo, pode levar o hospedeiro à morte. A dificuldade no diagnóstico laboratorial por coproparasitologia advém do fato dos ovos serem pesados, requerendo métodos de sedimentação para serem encontrados, e sua eliminação nas fezes ser intermitente e em pouco número. Assim, decidiu-se avaliar se uma droga com ação colerética e colagoga, características do ácido ursodesoxicólico, contribuiria para aumentar a concentração de ovos deste parasito nas fezes de gatos infectados. Para tanto, no primeiro semestre de 2003, 16 gatos de uma colônia localizada na Zona Oeste da Cidade do Rio de Janeiro, RJ, foram incluídos, sem restrição quanto à idade, sexo ou condições clínicas, embora todos os animais estivessem doentes e destinados à eutanásia pelos médicos veterinários responsáveis. Os animais foram alojados individualmente durante 10 dias e, sempre que defecavam, uma amostra de fezes era coletada. Todas as amostras eram examinadas por técnicas de sedimentação e flutuação. No quinto dia após o início das coletas das amostras de fezes todos receberam ácido ursodesoxicólico (10-15mg/kg) em dose única. No 10° dia após as coletas das amostras de fezes, todos os animais foram submetidos à eutanásia de acordo com a determinação do Conselho Federal de Medicina Veterinária, seguida de necropsia para pesquisa de ovos e de espécimes de P. illiciens na vesícula biliar e nos ductos biliares. Dentre os 16 animais, 12 estavam parasitados por P. illiciens (75%), dos quais nove albergavam formas adultas no fígado (56,25%). 10 animais (63%) apresentavam ovos nas amostras fecais e na vesícula biliar. A administração do ácido ursodesoxicólico não interferiu na sensibilidade das técnicas diagnósticas, embora o número de ovos nas fezes dos animais tenha aumentado. O exame de fezes por sedimentação de amostras seriadas, foi mais sensível do que por flutuação.
- Published
- 2011
14. Pathological findings in the caeca of naturally infected ostriches, Struthio camelus Linnaeus, 1758 (Aves, Struthionidae) parasitized by Codiostomum struthionis (Horst, 1885) Railliet and Henry, 1911 (Nematoda, Strongylidae)
- Author
-
de Oliveira, Francisco Carlos Rodrigues, Ederli, Nicole Brand, Lopes, Carlos Wilson Gomes, and Rodrigues, Maria de Lurdes de Azevedo
- Published
- 2009
- Full Text
- View/download PDF
15. EVALUATION OF ORAL ADMINISTRATION OF URSODEOXYCHOLIC ACID (AUDC) IN THE DIAGNOSIS OF NATURAL INFECTION IN CATS Platynosomum illiciens
- Author
-
Leal, Paulo Daniel Sant’Anna, Campos, Debora Porretti, Rodrigues, Maria de Lurdes de Azevedo, Botelho, Gilberto Garcia, Labarthe, Norma Volmer, Leal, Paulo Daniel Sant’Anna, Campos, Debora Porretti, Rodrigues, Maria de Lurdes de Azevedo, Botelho, Gilberto Garcia, and Labarthe, Norma Volmer
- Abstract
Leal P.D.S., Campos D.P., Rodrigues M. de L. de A., Botelho G.G. & Labarthe N.V. [Evaluation of oral administration of ursodeoxycholic acidin the diagnosis of natural infection in cats by Platynosomum illiciens]. Avaliação da administração oral de ácido ursodesoxicólico (AUDC) no diagnóstico da infecção natural por Platynosomum illiciens em gatos. Revista Brasileira de Medicina Veterinária, 33(4):229-233, 2011. Curso de Pós-Graduação de Ciências Veterinárias. Universidade Federal Rural do Rio de Janeiro, BR 465 km 7, Seropédica, RJ 23890-000, Brazil. Email: pauloleal@ctiveterinario.com.br Although infection by feline Platinosomum illiciens is common in Southeastern Brazil, in vivo diagnosis is rare. This disease presents with inflammation and obstruction of the bile ducts and, over time, the host can lead to death. The difficulty in diagnosis by parasitological laboratory results from the fact that eggs are heavy, requiring methods of sedimentation to be found, and its elimination in the feces be intermittent and few in number. So, we decided to evaluate whether a drug with choleretic action and bile duct, characteristic of ursodeoxycholic acid, would increase the concentration of parasite eggs in the feces of infected cats. Therefore, in the first half of 2003, 16 cats from a colony located in the western area of the city of Rio de Janeiro, Brazil, were included, without restriction as to age, gender or medical conditions, although all animals were sick and for the euthanasia by veterinarians responsible. The animals were housed individually for 10 days and, where defecated, a stool sample was collected. All samples were examined by techniques of sedimentation and flotation. On the fifth day after the beginning of the collection of all stool samples received ursodeoxycholic acid (10-15mg/kg) in a single dose. On the 10th day after the collection of stool samples, all animals were euthanized in accordance with the determination of the Federal Council o, Embora infecções em gatos por Platinosomum illiciens sejam frequentes no sudeste brasileiro, o diagnóstico in vivo é raro. Esta parasitose cursa com inflamação e obstrução dos dutos biliares e, ao longo do tempo, pode levar o hospedeiro à morte. A dificuldade no diagnóstico laboratorial por coproparasitologia advém do fato dos ovos serem pesados, requerendo métodos de sedimentação para serem encontrados, e sua eliminação nas fezes ser intermitente e em pouco número. Assim, decidiu-se avaliar se uma droga com ação colerética e colagoga, características do ácido ursodesoxicólico, contribuiria para aumentar a concentração de ovos deste parasito nas fezes de gatos infectados. Para tanto, no primeiro semestre de 2003, 16 gatos de uma colônia localizada na Zona Oeste da Cidade do Rio de Janeiro, RJ, foram incluídos, sem restrição quanto à idade, sexo ou condições clínicas, embora todos os animais estivessem doentes e destinados à eutanásia pelos médicos veterinários responsáveis. Os animais foram alojados individualmente durante 10 dias e, sempre que defecavam, uma amostra de fezes era coletada. Todas as amostras eram examinadas por técnicas de sedimentação e flutuação. No quinto dia após o início das coletas das amostras de fezes todos receberam ácido ursodesoxicólico (10-15mg/kg) em dose única. No 10° dia após as coletas das amostras de fezes, todos os animais foram submetidos à eutanásia de acordo com a determinação do Conselho Federal de Medicina Veterinária, seguida de necropsia para pesquisa de ovos e de espécimes de P. illiciens na vesícula biliar e nos ductos biliares. Dentre os 16 animais, 12 estavam parasitados por P. illiciens (75%), dos quais nove albergavam formas adultas no fígado (56,25%). 10 animais (63%) apresentavam ovos nas amostras fecais e na vesícula biliar. A administração do ácido ursodesoxicólico não interferiu na sensibilidade das técnicas diagnósticas, embora o número de ovos nas fezes dos animais tenha aumentado. O exame de fezes por sedimentaç
- Published
- 2011
16. Oncocercose eqüina: diagnóstico e verificação da hematofagia por simulídeos e culicóides, prováveis vetores no Rio de Janeiro, Brasil
- Author
-
Calvão-Brito, Regina Helena dos Santos, Rodrigues, Maria de Lurdes de Azevedo, Mokrabe, Elázaro Moses, Maia-Herzog, Marilza, Mello, Rubens Pinto de, and Silva-Júnior, Virgínio Pereira da
- Subjects
black flies ,Onchocerca cervicalis ,parasitic diseases ,Rio de Janeiro ,virus diseases ,biting-midges ,equines ,Brazil - Abstract
Onchocerca cervicalis Railliet & Henry, 1910 is a nematode that parasite equines. Its ocurrence has already been reported in the States of Mato Grosso and Rio de Janeiro, Brazil. Different diagnostic techniques were used in this study to establish the prevalence of the parasite in Rio de Janeiro State and the biting behaviour of the simuliid and ceratopogonid species suspected of being vectors was studied. All of the biopsies made in the region of the withers, shoulder and umbilicus of 57 animals were negative. Necropsies carried out on 28 equines revealed 4 to be positive for the parasite; 2 for microfilariae and 2 for adults. Simuliid flies showed preference for biting the ventral region and ceratopogonids the lower parts of the legs of horses. It was concluded that a more detailed investigation is required to determine a better diagnostic technique in order to verify prevalence rates of the parasite in horses in the State.
- Published
- 1998
17. Cyathostomin larvae: presence on Brachiaria humidicola grass during the rainy and dry seasons of Brazil
- Author
-
Santos, Claudia Navarro dos, primary, Souza, Luciene Soares de, additional, Vieira, Vivian Suane de Freitas, additional, Pinheiro, Jairo, additional, and Rodrigues, Maria de Lurdes de Azevedo, additional
- Published
- 2012
- Full Text
- View/download PDF
18. Gross anatomy of the musculature and a new description of the reproductive system ofTanaisia bragaiandTanaisia inopina(Trematoda: Eucotylidae) analysed by confocal laser scanning microscopy
- Author
-
D’ávila, Sthefane, primary, Manso, Pedro Paulo de Abreu, additional, Bessa, Elisabeth Cristina de Almeida, additional, Rodrigues, Maria de Lurdes de Azevedo, additional, and Dias, Roberto Júnio Pedroso, additional
- Published
- 2010
- Full Text
- View/download PDF
19. Controle biológico de nematóides gastrintestinais de caprinos em clima semi-árido pelo fungo Monacrosporium thaumasium
- Author
-
Araújo, Jackson Victor de, primary, Rodrigues, Maria de Lurdes de Azevedo, additional, Silva, Wilson Wouflan, additional, and Vieira, Luiz da Silva, additional
- Published
- 2007
- Full Text
- View/download PDF
20. Physiological changes in Biomphalaria glabrata say, 1818 (Pulmonata: Planorbidae) caused by sub-lethal concentrations of the latex of Euphorbia splendens var. hislopii N.E.B (Euphorbiaceae)
- Author
-
Mello-Silva, Clélia Christina, primary, Vasconcellos, Maurício Carvalho de, additional, Pinheiro, Jairo, additional, and Rodrigues, Maria de Lurdes de Azevedo, additional
- Published
- 2006
- Full Text
- View/download PDF
21. Predatory activity of Arthrobotrys oligospora and Duddingtonia flagrans on pre-parasitic larval stages of cyathostominae under different constant temperatures
- Author
-
Santos, Clóvis de Paula, primary, Padilha, Terezinha, additional, and Rodrigues, Maria de Lurdes de Azevedo, additional
- Published
- 2001
- Full Text
- View/download PDF
22. Comparação entre diferentes técnicas coprológicas e larvacultura para o diagnóstico das helmintoses gastrointestinais de bovinos
- Author
-
Lessa, Cláudia Soares Santos, primary, Rodrigues, Maria de Lurdes de Azevedo, additional, Serra-Freire, Nicolau Maués da, additional, and Araújo, Márcia Medeiros de, additional
- Published
- 1999
- Full Text
- View/download PDF
23. Oncocercose eqüina: diagnóstico e verificação da hematofagia por simulídeos e culicóides, prováveis vetores no Rio de Janeiro, Brasil
- Author
-
Calvão-Brito, Regina Helena dos Santos, primary, Rodrigues, Maria de Lurdes de Azevedo, additional, Mokrabe, Elázaro Moses, additional, Maia-Herzog, Marilza, additional, Mello, Rubens Pinto de, additional, and Silva-Júnior, Virgínio Pereira da, additional
- Published
- 1998
- Full Text
- View/download PDF
24. Efeito do fungo Metarhizium anisopliae sobre estádios pré-parasíticos de Cyathostominae (Nematoda: Strongylidae)
- Author
-
Rodrigues, Maria de Lurdes de Azevedo, primary, Bittencourt, Vânia Rita Elias Pinheiro, additional, Anjos, Débora Henrique da Silva, additional, and Castro, Abisair Andrade de, additional
- Published
- 1996
- Full Text
- View/download PDF
25. Gross anatomy of the musculature and a new description of the reproductive system of Tanaisia bragai and Tanaisia inopina (Trematoda: Eucotylidae) analysed by confocal laser scanning microscopy.
- Author
-
D'ávila, Sthefane, Manso, Pedro Paulo de Abreu, Bessa, Elisabeth Cristina de Almeida, Rodrigues, Maria de Lurdes de Azevedo, and Dias, Roberto Júnio Pedroso
- Subjects
ANATOMY ,MUSCLES ,TREMATODA ,PLATYHELMINTHES ,WORMS - Abstract
D’ávila, S., Manso, P. P. A., Bessa, E. C. A., Rodrigues, M. L. A. and Dias, R. J. P. 2010. Gross anatomy of the musculature and a new description of the reproductive system of Tanaisia bragai and Tanaisia inopina (Trematoda: Eucotylidae) analysed by confocal laser scanning microscopy. — Acta Zoologica (Stockholm) 91: 139–149 Confocal scanning laser microscopy has become an important tool to clarify the organization of the musculature and innervation, as well as the morphology of the reproductive and alimentary tract of various helminth species. The goal of this work was to describe the morphology of the reproductive system and the gross anatomy of the musculature of adults of the species Tanaisia bragai and Tanaisia inopina by means of confocal scanning laser microscopy. The helminths were found parasitizing the kidney collection ducts of Columba livia, in the municipality of Juiz de Fora, Brazil. These helminths were stained with Mayer's carmalum, mounted on permanent slides and observed through a confocal scanning laser microscope. The tomographic images showed the morphology of the organs and glands of the reproductive system, along with the general morphology of the musculature of the body wall, oral sucker, acetabulum, pharynx, intestinal caeca, oesophagus and reproductive system ducts. The present work is the first re-characterization of the reproductive tract of T. bragai and T. inopina. We also present the first description of the general morphology of the gametes and cells of the glands associated with the reproductive apparatus of these species. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
26. Immunological and histopathological changes in Biomphalaria glabrata SAY, 1818 (Pulmonata: Planorbidae) infected by Schistosoma mansoni SAMBON, 1907 (Trematoda: Schistosomatidae) and exposed to the sublethal concentration of latex of Euphorbia milii (syn splendens) var. hislopii (Euphorbiaceae)
- Author
-
Trevisano, Gabriela Friani Vieira, G?lo, Patr?cia Silva, Costa, Cl?lia Christina Mello-Silva Almeida da, Rodrigues, Maria de Lurdes de Azevedo, and Costa, Maria J?lia Faro dos Santos
- Subjects
haemocytes ,Euphorbia milii ,Biomphalaria glabrata ,hem?citos ,Medicina Veterin?ria - Abstract
Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2019-03-29T21:06:47Z No. of bitstreams: 1 2017 - Gabriela Friani Vieira Trevisano.pdf: 1613264 bytes, checksum: f77c02dc71a7939d18800c799fd859d8 (MD5) Made available in DSpace on 2019-03-29T21:06:47Z (GMT). No. of bitstreams: 1 2017 - Gabriela Friani Vieira Trevisano.pdf: 1613264 bytes, checksum: f77c02dc71a7939d18800c799fd859d8 (MD5) Previous issue date: 2017-02-23 CNPq In Brazil, schistosomiasis mansoni affects about 7 million people and other 25 millions are at the risk contrating a disease. One of the ways to control schistosomiasis is the use of molluscicides to control the intermediate host. Among the non-chemicals tested, latex Euphorbia milii var. hislopii showed molluscicide potencial in low concentrations following the criteria of WHO. This thesis aimed to verify Biomphalaria glabrata immunological and tissue changes caused by exposure to a sublethal concentration of E. milii latex for 24 hours. The analysis were made in 4 groups of mollusks : infected by S. mansoni and exposed to latex (IE) uninfected and exposed to latex (E), only infected (I) and control ? neither infected nor exposed (C). The immunological analysis was made in 10 mollusks of each group through the quantification, chracterization of hemocytes and production of nitric oxide. In relation to histology, five mollusks of each group were separated to the analysis, through longitudinal sections. The results related to the number of hemocytes were: group I presented the lower number of hemocytes than others and group IE showed the significative increase comparing with the others. The groups E and C did not present significative difference. Three types of hemocytes were found: hyalinocytes, granulocytes and blast-like cells. In all the groups the proportion of hyalinocytes was superior, C (59,8%), E (47,5%), I (45,7%), IE (41,3%). In groups E (28,4%), I (36,8%) and IE (31,7%) the second greatest type was granulocytes followed by blast-like cells in lower proportion. In group C the blast-like cells represented 27,5%, followed by granulocytes 12,5%. There was no significant difference among the cell types and the different groups analyzed in 24 hours. Comparing the types of hemocytes in each group significant difference was observed between the number of cells of the type hyalinocytes and blast-like in the control and infected group. Concerning the NO production, the mollusks of group C showed an increase comparing with the others. There was no difference in the NO production comparing the group IE with the groups E and I. Whereas the group E presented a reduction in relation to the group I. The E.milii latex exposition promoted, in the group infected by S. mansoni a great proliferation of hemocytes in the tentacles, mantle, mufla, digestive gland, kidney and ovotestis. In the digestive gland and the kidney were observed granulomatous reactions around the sporocysts, characteristics of mollusks resistant to the infection. In the mantle, tissue destruction with dead sporocysts was observed. In the uninfected group and exposed, there was also proliferation of hemocytes in the kidney and the digestive gland, besides of this we observed edema in the mantle area. We conclude that the sublethal concentration of the latex of E. milii influenced the immune response of the suscetible lineage B. glabrata to infection by S.mansoni, promoving the destruction of parasites as observed in resistant snails. No Brasil a esquistossomose mans?nica acomete cerca de sete milh?es de pessoas e 25 milh?es est?o sob risco contrair a doen?a. Uma das medidas de controle da esquistossomose ? o uso de moluscicidas, dentre os naturais testados, o l?tex de Euphorbia milii var. hislopii apresentou-se como potencial moluscicida em baixas concentra??es, enquadrando-se nos crit?rios da OMS. Este trabalho tem por objetivo verificar as altera??es imunol?gicas e teciduais provocadas pela exposi??o ? concentra??o subletal do l?tex de E. milii por 24 horas em Biomphalaria glabrata infectada por Schistosoma mansoni. As analises foram feitas em quatro grupos de moluscos: infectado por S. mansoni e exposto ao l?tex (IE), n?o infectado e exposto ao l?tex (E), apenas infectado (I) e controle - sem infec??o e exposi??o (C). As altera??es imunol?gicas foram analisadas individualmente em 10 moluscos de cada grupo, atrav?s da quantifica??o e tipagem de hem?citos e produ??o de ?xido n?trico. Em rela??o ? histologia, cinco moluscos de cada grupo foram separados para a an?lise, atrav?s de cortes longitudinais. Os resultados relacionados a contagem de hem?citos foram: o grupo I apresentou menor quantidade de hem?citos, e o grupo IE a maior. Os grupos E e C n?o apresentaram diferen?a significativa. Foram encontrados tr?s tipos de hem?citos: hialin?citos, granul?citos e c?lulas bl?sticas. Em todos os grupos a propor??o hialin?citos foi superior, C (59,8%), E (47,5%), I (45,7%), IE (41,3%). Nos grupos E (28,4%), I (36,8%) e IE (31,7%) o segundo maior tipo de hem?citos foi granul?citos, seguido por c?lulas bl?sticas em menor propor??o. No grupo C as c?lulas bl?sticas representaram 27,5%, seguido dos granul?citos 12,5%. N?o houve diferen?a significativa entre os tipos celulares e os diferentes grupos analisados em 24 horas. Comparando os tipos de hem?citos em cada grupo, observamos diferen?a significativa entre o n?mero de c?lulas do tipo hialin?citos e bl?sticas tanto nos grupos controle, como dos infectados. Com rela??o a produ??o de ?xido n?trico (NO), os moluscos do grupo C apresentaram uma quantidade superior comparado aos demais. N?o houve diferen?a na produ??o NO comparando o grupo IE, com os grupos E e I. O grupo E apresentou uma redu??o em compara??o com o grupo I. A exposi??o ao l?tex promoveu no grupo IE, intensa prolifera??o de hem?citos no tent?culo, manto, mufla, gl?ndula digestiva, rim e ovotestes. Na gl?ndula digestiva e no rim foram observadas rea??es granulomatosas em torno dos esporocistos, caracter?stica de moluscos refrat?rios ? infec??o. No manto, foi observado destrui??o tecidual com esporocistos mortos. No grupo E tamb?m houve prolifera??o hemocit?ria no rim e na gl?ndula digestiva, al?m de edemas na regi?o do manto.Conclui-se que a concentra??o subletal do l?tex de E. milii influenciou a resposta imune celular de uma linhagem suscet?vel de B. glabrata a infec??o por S. mansoni, levando a destrui??o dos parasitos no tecido como observado em linhagens de moluscos resistentes a infec??o.
- Published
- 2017
27. Metabolism characterization Aerobic and Anaerobic Biomphalaria glabrata Say, 1818 (Pulmonata, Planorbidae) Experimentally Infected With Different Doses of Miracidiais Echinostoma paraensei (Lie and Basch, 1967)
- Author
-
Alves, Victor Menezes Tunholi, Rodrigues, Maria de Lurdes de Azevedo, Silva, Jairo Pinheiro da, Torres, Eduardo Jos? Lopes, Mello-Silva, Cl?lia Christina Corr?a de, Garcia, Juberlan Silva, and Angelo, Isabele da Costa
- Subjects
homeostasis ,Echinostoma paraensei ,homeostase ,Biomphalaria glabrata ,Medicina Veterin?ria - Abstract
Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2017-05-31T11:58:11Z No. of bitstreams: 1 2015 - Victor Menezes Tunholi Alves.pdf: 1068543 bytes, checksum: f36d6e4d78a70514a148e30e4249805b (MD5) Made available in DSpace on 2017-05-31T11:58:11Z (GMT). No. of bitstreams: 1 2015 - Victor Menezes Tunholi Alves.pdf: 1068543 bytes, checksum: f36d6e4d78a70514a148e30e4249805b (MD5) Previous issue date: 2015-10-14 CNPq - Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico Parasites belonging to the Echinostoma genus are characterized by having a complex biological cycle, with two intermediate hosts and a final habitat restricted to the intestinal lumen of the definitive hosts. These hosts include aquatic birds, mammals (including humans) and occasionally some reptile and fish species. Their first intermediate hosts are freshwater snails, into which the miracidia actively penetrate for development of the next three stages (sporocysts, rediae and cercariae). Freshwater crustaceans, amphibians, fish and snails act as the second intermediate hosts, enabling the formation of metacercariae, the infective larval stage to the definitive host. In this work, Biomphalaria glabrata specimens were experimentally infected with different doses (5 or 50) of E. paraensei miracidia. The snails were dissected one, two, three and four weeks after infection to collect the hemolymph, shells and tissues (gonad-digestive gland complex- GDG). In the hemolymph were quantified glucose concentrations and carboxylic acids (succinic, pyruvic, lactic and oxalic acids), as well as the activity of lactate dehydrogenase (LDH). The storage of tissues was measured glycogen content and oxygen consumption (O2). Changes were observed in glycemia of the snails, in both situations parasitism, with significant increase in glucose levels observed from the third week post infection when compared to the control group. Changes have also been described in relation to the activity of lactate dehydrogenase and are characterized by the increase of its activity in the later periods of infection. In parallel, there was a decrease in glycogen content in storage tissues, being such greater reduction in the digestive gland (larval development site) in comparison to the cephalopedal mass. In addition, the infection by both miracidiais doses resulted in increased levels of oxalic acid and lactic acid, as well as a decline in the content of pyruvic and succinic acids in B. glabrata. The prepatent infection by this equinostomatideo still significantly suppressed the phosphorylation state (state 3 respiration) and basal oxygen consumption (state 1 and 2) in B. glabrata, demonstrating that infection by E. paraensei decreases the capacity of the intermediate host in performing aerobic oxidative reactions. These results demonstrate the reduction in oxidative decarboxylation rate of the reactions that are part of the tricarboxylic acid cycle and acceleration of the process of anaerobic degradation of carbohydrates in the infected snails by lactic acid fermentation, it is essential to ensure the obtaining of energy and the success of the infection. Thus, the results observed in this study demonstrate that infection with five or 50 miracidia of E. paraensei caused significant metabolic changes in B. glabrata snails being exposed to the largest load miracidial showed the greatest damage, featuring a dose-dependent response Parasitos pertencentes ao g?nero Echinostoma caracterizam por apresentar um ciclo biol?gico complexo, com dois hospedeiros intermedi?rios e s?tio final de infec??o restrito ao l?men intestinal de seus hospedeiros definitivos. Estes hospedeiros s?o representados principalmente por aves aqu?ticas e semi-aqu?ticas, mam?feros, incluindo o homem, e ocasionalmente algumas esp?cies de r?pteis e peixes. Possuem como primeiros hospedeiros intermedi?rios moluscos l?mnicos, onde os mirac?dios penetram ativamente e desenvolvem at? os est?gios de esporocistos, r?dias e cerc?rias. Por sua vez, crust?ceos, anf?bios, peixes e moluscos l?mnicos atuam como segundos hospedeiros intermedi?rios onde ocorre a forma??o de metacerc?rias, est?gios infectantes ao hospedeiro definitivo. Neste estudo, Biomphalaria glabrata foi experimentalmente infectada com diferentes doses miracidiais (5 ou 50) de E. paraensei. Os moluscos foram dissecados ap?s uma, duas, tr?s e quatro semanas de infec??o para a coleta da hemolinfa e tecidos (complexo g?nada-gl?ndula digestiva- GGD e massa cefalopediosa). Na hemolinfa foram quantificadas as concentra??es de glicose e de ?cidos carbox?licos (succ?nico, pir?vico, l?tico e ox?lico), bem como a atividade da lactato desidrogenase (LDH). Nos tecidos de estocagem foram mensurados os conte?dos de glicog?nio e consumo de oxig?nio (O2). Altera??es foram observadas na glicemia dos moluscos, em ambas as situa??es de parasitismo, com significativo aumento dos n?veis de glicose verificado a partir da terceira semana de infec??o quando comparado ao grupo controle. Mudan?as foram tamb?m descritas em rela??o ? atividade da lactato desidrogenase, sendo caracterizadas pelo aumento de sua atividade nos per?odos mais tardios da infec??o. Em paralelo, verificou-se um decr?scimo nos conte?dos de glicog?nio em tecidos de armazenamento, sendo tal redu??o maior na gl?ndula digestiva (s?tio de desenvolvimento larval), em compara??o ? massa cefalopediosa. A infec??o por ambas as doses miracidiais ainda resultou em um aumento dos n?veis de ?cidos ox?lico e l?tico, bem como em um decl?nio nos conte?dos de ?cidos pir?vico e succ?nico em B. glabrata. Significativa supress?o no estado fosforilativo (estado 3 respirat?rio) e no consumo basal de oxig?nio (estado 1 e 2) em B. glabrata infectada por E. paraensei foi demonstrada, indicando que a infec??o por este equinostomat?deo diminui a capacidade do hospedeiro intermedi?rio em realizar rea??es oxidativas aer?bias. Varia??es relevantes relacionadas ao estado mitocondrial desacoplado (estado 3u) de B. glabrata infectada por tal tremat?deo foram tamb?m descritas. Tais resultados demonstram redu??o na taxa de descarboxila??o oxidativa das rea??es que integram o ciclo do ?cido tricarbox?lico e acelera??o do processo de degrada??o anaer?bia de carboidratos nos moluscos infectados, atrav?s da fermenta??o l?tica, essencial para garantir a obten??o de energia e o sucesso da infec??o. Assim, os resultados observados neste estudo demonstram que a infec??o com cinco ou 50 mirac?dios de E. paraensei provocou consider?veis altera??es metab?licas em B. glabrata, sendo que os moluscos expostos a maior carga miracidial apresentaram os maiores danos, caracterizando uma resposta dosedependente.
- Published
- 2015
28. Evaluation of the influence of aqueous latex of Euphorbia milii var. hislopii (EUPHORBIACEAE) on the biological cycle of Schistosoma mansoni (TREMATODA, SCHISTOSOMATIDAE) under laboratory conditions
- Author
-
Augusto, Ronaldo de Carvalho, Rodrigues, Maria de Lurdes de Azevedo, Silva, Cl?lia Christina Corr?a de Mello, Vasconcellos, Maur?cio de Carvalho, and Silva, Jairo Pinheiro da
- Subjects
Control of schistosomiasis ,molluscicide ,schistosomicidal ,moluscicida ,Controle da esquistossomose ,esquistossomicida ,Medicina Veterin?ria - Abstract
Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2019-06-21T19:46:23Z No. of bitstreams: 1 2012 - Ronaldo de Carvalho Augusto.pdf: 2492099 bytes, checksum: bbae097e5ec86483876ad755ec720cb6 (MD5) Made available in DSpace on 2019-06-21T19:46:23Z (GMT). No. of bitstreams: 1 2012 - Ronaldo de Carvalho Augusto.pdf: 2492099 bytes, checksum: bbae097e5ec86483876ad755ec720cb6 (MD5) Previous issue date: 2012-06-06 CAPES Schistosomiasis is one the most prevalent parasitic diseases in the world. With the problem of schistosomiasis infection control, the World Health Organization (WHO) has encouraged the development of strategies which aimed reducing / eliminating the Schistosoma mansoni in endemic areas. The aqueous solutions of latex from Euphorbia milii (syn. splendens) var. hislopii has showed relevant characteristics such as the selective product in the control of the disease on a large scale. The presence in the environment of evolutionary stages (eggs, miracidia and cercariae) and the pre-patent and patent periods in the intermediate host are critical stages in the cycle development, as in these periods such forms are more susceptible to the action of products administered in water. This study will be presented in article format and will be divided into three chapters, namely: 1 - Effect of molluscicide E. milii var. hislopii on the development of S. mansoni in Biomphalaria glabrata, 2 - Control of the dynamics of parasite S. mansoni in B. glabrata by exposure of eggs and miracidia with E. milii var. hislopii, and, 3-Influence of the latex of E. milii var. hislopii in the formation of S. mansoni in its definitive host. Based on the results, we conclude that the molluscicidal and schistosomicidal propertie of the product in question, enabled by the action of the product in infectious forms and in the intermediate hosts, promotes concomitantly and efficiently the control of transmission and morbidity of the disease. It is a unique product, being natural, biodegradable, low-dose, ecologically viable and altering the development of the parasite cycle in the definitive and intermediate hosts, leading to the reduction of infectious forms and the preservation of mollusc populations in their natural habitat. A esquistossomose est? entre as doen?as parasit?rias mais prevalentes do mundo. Diante da problem?tica do controle da infec??o esquistossom?tica, a Organiza??o Mundial de Sa?de (OMS) tem estimulado o desenvolvimento de estrat?gias que objetivam a redu??o/elimina??o do ciclo de Schistosoma mansoni em ?reas end?micas. O extrato aquoso do l?tex de Euphorbia milii (syn. splendens) var. hislopii apresenta relevantes caracter?sticas como produto seletivo no controle da endemia em larga escala. A presen?a das formas evolutivas no ambiente (ovos, mirac?dios e cerc?rias) e os per?odos pr?-patente e patente no hospedeiro intermedi?rio, s?o fases cr?ticas do desenvolvimento do ciclo, dado que nesses per?odos tais formas encontram-se mais suscept?veis a a??o de produtos veiculados no recurso h?drico. A presente disserta??o apresentar? o formato de artigo e ser? dividida em tr?s cap?tulos, sendo eles: 1- Efeito do moluscicida E. milii var. hislopii no desenvolvimento de S. mansoni em Biomphalaria glabrata, 2- Controle da din?mica parasit?ria de S. mansoni em B. glabrata atrav?s do tratamento de ovos e mirac?dios com E. milii var. hislopii e, 3-Influ?ncia do l?tex de E. milii var. hislopii na forma??o de S. mansoni no hospedeiro definitivo. Com base nos resultados obtidos, podemos concluir que a propriedade moluscicida e esquistossomicida do produto em quest?o, viabilizada pela a??o do mesmo nas formas infectantes e nos hospedeiros intermedi?rios promove de forma concomitante e eficiente o controle da transmiss?o e da morbidade da doen?a. Um ?nico produto, natural, biodegrad?vel, em baixas doses, vi?vel ecologicamente altera o desenvolvimento do ciclo do parasito nos hospedeiros intermedi?rios e definitivos, gerando a redu??o de formas infectantes e a preserva??o das popula??es de moluscos em seu habitat natural.
- Published
- 2012
29. Parasite community of four species of anostomid fishes from Tr?s Marias Reservoir, Upper S?o Francisco River, Minas Gerais, Brazil
- Author
-
Martins, Amanda Nascimento, Brasil-Sato, Marilia de Carvalho, Cohen, Simone Chiniks, Anjos, D?bora Henriques da Silva, Ramos, Dimitri Alves, Rodrigues, Maria de Lurdes de Azevedo, and Borba, Helcio Resende
- Subjects
Schizodon knerii ,Leporinus obtusidens ,rio S?o Francisco ,parasitos de peixes de ?gua doce ,Leporinus reinhardti ,Parasitologia ,S?o Francisco river ,freshwater fishes parasites ,Leporinus piau - Abstract
Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2020-05-20T18:21:09Z No. of bitstreams: 1 2012 - Amanda Nascimento Martins.pdf: 8088118 bytes, checksum: e0bb918dd955bab8f20041c7f1a3e16c (MD5) Made available in DSpace on 2020-05-20T18:21:09Z (GMT). No. of bitstreams: 1 2012 - Amanda Nascimento Martins.pdf: 8088118 bytes, checksum: e0bb918dd955bab8f20041c7f1a3e16c (MD5) Previous issue date: 2012-03-28 Two hundred and sixty-six foraging fishes being 69 specimens of Leporinus obtusidens (Valenciennes, 1837), 66 of Leporinus piau Fowler, 1941, 62 of Leporinus reinhardti L?tken, 1875 and 69 of Schizodon knerii (Steindachner, 1875) (Actinopterygii, Anostomidae) were collected in the Tr?s Marias reservoir, upper S?o Francisco river, along the influence of Borrachudo River (18?12'59"S and 45?17'34"W), during periods of dry, July 2007, 2008 e 2009, and rain, January 2008, 2009 e 2010. Were found 28 species of metazoan parasites: adult specimens of Jainus sp., Rhinoxenus arietinus, Rhinoxenus nyttus, Tereancistrum sp., Urocleidoides sp., unidentified species of Dactylogyridae, Prosthenhystera obesa, Goezia brasiliensis, Paracapillaria piscicola, Procamallanus amarali, Procamallanus sp.1, Procamallanus sp.2, Neoechinorhynchus sp., Argulus multicolor, Ergasilus sp. and Gamispatulus schizodontis; one young specimen of Braga fluviatilis; larval specimens of Henneguya sp., Acanthostomum sp., Austrodiplostomum sp., Metacest?ides, Contracaecum sp. Tipo 2, Cystidicoloides sp., Procamallanus sp.3, Rhabdochona acuminata and Spiroxys sp.; beyond adults and larval of Procamallanus inopinatus and Pracamallanus saofranciscencis. Nine species were common in the four hosts: Acanthostomum sp., Ergasilus sp., G. schizodontis, R. arietinus and R. nyttus, Metacest?ides, P. piscicola, P. inopinatus and Procamallanus sp1. The species more prevalent, in four species of anostomid hosts, were P. inopinatus and metacest?ides. The parasite infracommunities had higher qualitative similarity in the hosts L. obtusidens and L. piau and higher quantitative similarity in S. knerii and L. piau. The structure of parasite communities of L. obtusidens, L. piau, L. reinhardti and S. knerii were similar, due of few core species, limited number of secondary species and the presence of numerous satellite species, low number of significant interspecific associations, beyond the absence of dominance. The species found in the anostomids, except for Ergasilus sp., Contracaecum sp. and P. inopinatus, expanded the list of known hosts in the S?o Francisco river basin while R. arietinus, R. nyttus, Urocleidoides sp., unidentified species of Dactylogyridae, G. brasiliensis, P. amarali, Procamallanus sp.1, Procamallanus sp.2, Procamallanus sp.3 and G. schizodontis had expanded its geographical distribution for this basin. Duzentos e sessenta e seis peixes forageiros sendo 69 esp?cimes de Leporinus obtusidens (Valenciennes, 1837), 66 de Leporinus piau Fowler, 1941, 62 de Leporinus reinhardti L?tken, 1875 e 69 de Schizodon knerii (Steindachner, 1875) (Actinopterygii, Anostomidae) foram coletados no reservat?rio de Tr?s Marias, alto rio S?o Francisco, na ?rea de influ?ncia do Rio Borrachudo (18?12'59"S e 45?17'34"W), durante os per?odos de estiagem, julho de 2007, 2008 e 2009, e chuvoso, janeiro de 2008, 2009 e 2010. Foram encontradas 28 esp?cies de metazo?rios parasitos: esp?cimes adultos de Jainus sp., Rhinoxenus arietinus, Rhinoxenus nyttus, Tereancistrum sp., Urocleidoides sp., uma esp?cie n?o identificada de Dactylogyridae, Prosthenhystera obesa, Goezia brasiliensis, Paracapillaria piscicola, Procamallanus amarali, Procamallanus sp.1, Procamallanus sp.2, Neoechinorhynchus sp., Argulus multicolor, Ergasilus sp. e Gamispatulus schizodontis; um esp?cime juvenil de Braga fluviatilis; esp?cimes larvais de Henneguya sp., Acanthostomum sp., Austrodiplostomum sp., Metacest?ides, Contracaecum sp. Tipo 2, Cystidicoloides sp., Procamallanus sp.3, Rhabdochona acuminata e Spiroxys sp.; al?m de adultos e larvas de Procamallanus inopinatus e Procamallanus saofranciscencis. Nove esp?cies foram comuns aos quatro hospedeiros: Acanthostomum sp., Ergasilus sp., G. schizodontis, R. arietinus e R. nyttus, Metacest?ides, P. piscicola, P. inopinatus e Procamallanus sp.1. As esp?cies mais prevalentes, nas quatro esp?cies de hospedeiros anostom?deos, foram P. inopinatus e metacest?ides. As infracomunidades parasit?rias apresentaram maior similaridade qualitativa nos hospedeiros L. obtusidens e L. piau e maior similaridade quantitativa em S. knerii e L. piau. A estrutura das comunidades parasit?rias de L. obtusidens, L. piau, L. reinhardti e S. knerii foi semelhante, pela baixa ocorr?ncia de esp?cies centrais, pelo limitado n?mero de esp?cies secund?rias, pela presen?a de v?rias esp?cies sat?lites, poucas associa??es interespec?ficas significativas, al?m da aus?ncia de domin?ncia. As esp?cies encontradas nos anostom?deos, com exce??o de Ergasilus sp., Contracaecum sp., P. inopinatus e Procamallanus sp., ampliaram a lista de hospedeiros conhecidos na bacia do rio S?o Francisco enquanto R. arietinus, R. nyttus, Urocleidoides sp., a esp?cie n?o identificada de Dactylogyridae, G. brasiliensis, P. amarali, Procamallanus sp.1, Procamallanus sp.2, Procamallanus sp.3 e G. schizodontis tiveram sua distribui??o geogr?fica ampliada para esta bacia.
- Published
- 2012
30. Evaluation of the Development of Eggs Ancylostoma caninum and Trichuris vulpis Subject to Low Temperatures and Experimental Infection in Dogs with Trichuris vulpis
- Author
-
Vieira, Vivian Suane de Freitas, Rodrigues, Maria de Lurdes de Azevedo, Scott, Fabio Barbour, Silva, Clelia Christina Correa de Mello, and Borba, Helcio Resende
- Subjects
C?es ,Dogs ,Estocagem ,A. caninum. T. vulpis ,Temperature ,Storage ,Temperatura ,Experimental infection ,Infec??o experimental ,Medicina Veterin?ria - Abstract
Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2020-06-23T22:44:03Z No. of bitstreams: 1 2012 - Vivian Suane de Freitas Vieira.pdf: 1157142 bytes, checksum: 7f4a62c37875dcf808250851eba1f73a (MD5) Made available in DSpace on 2020-06-23T22:44:03Z (GMT). No. of bitstreams: 1 2012 - Vivian Suane de Freitas Vieira.pdf: 1157142 bytes, checksum: 7f4a62c37875dcf808250851eba1f73a (MD5) Previous issue date: 2012-02-29 Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico, CNPq, Brasil Ancylostoma caninum and Trichuris vulpis are gastrointestinal nematodes of dogs, they have worldwide distribution and are of great importance in veterinary medicine. Prevalence studies show that these nematodes are present in Brazil, domiciled and stray dogs. They have great importance in public health, being considered as etiologic agents of Syndrome Larva Migrans Cutaneous and Visceral, respectively. Dogs infected play an important role in the spread of these nematodes, especially in public places, due to not remove the feces containing phases of development, increasing the chance of infection of dogs and people, mainly children.The effect of temperature on egg development of geo-helminths is rarely studied, it is first carried out a study to assess egg after storage at low temperatures. This study aimed to assess the development of eggs A.caninum and T.vulpis kept under ? 10?C and -4?C. Feces stored under ? 10?C can be used to perform the EPG A. caninum up to 10 weeks, most of the eggs remained in stock after gastrula stage, and egg viability is affected not going development to L 3 . Feces samples can be used to evaluate the OPG T. vulpis stock after the ? 10?C and -4? C for up to 12 weeks. Eggs of T. vulpis develop until egg larvae after inventory at low temperatures. Doses of 1,000 and 1,500 embryonated eggs generated T.vulpis infection in dogs and haematological indices remained close to the reference in spite of infection. T.vulpis eggs experimentally infected dogs developed into larvae after egg inventory at low temperatures Ancylostoma caninum e Trichuris vulpis s?o nemat?ides gastrintestinais de c?es, possuem ampla distribui??o mundial, t?m grande import?ncia em Medicina Veterin?ria .Estudos sobre preval?ncia mostram que esses nemat?ides est?o presentes em todo o Brasil,em c?es domiciliados e errantes. Possuem import?ncia em Sa?de P?blica, sendo considerados como agentes etiol?gicos da S?ndrome da Larva Migrans Cut?nea e Visceral respectivamente. Os c?es infectados possuem importante papel na dissemina??o desses nemat?ides, principalmente em locais p?blicos, devido a n?o remo??o das fezes contendo fases de desenvolvimento dos, aumentando a chance de infec??o de c?es e pessoas, principalmente crian?as.O efeito da temperatura sobre o desenvolvimento dos ovos desses geo-helmintos ? pouco estudado e pela primeira vez ? realizado um estudo para avalia??o de ovos ap?s estocagem sob baixas temperaturas.Este trabalho teve como objetivo avaliar o desenvolvimento de ovos de A.caninum e T.vulpis mantidos sob ?10?C e - 4?C.Fezes estocadas sob ?10?C podem ser utilizadas para realiza??o do OPG de A. caninum at? 10 semanas,grande parte dos ovos permaneceu em fase de g?strula ap?s estoque e a viabilidade de ovos ? afetada n?o ocorrendo desenvolvimento at? L 3 Amostras de fezes podem ser utilizadas para avalia??o do OPG de T. vulpis ap?s estoque a ?10?C e -4?C por at? 12 semanas . Ovos de T. vulpis se desenvolvem at? ovo larvado ap?s estoque em baixas temperaturas. Doses de 1.000 e 1.500 ovos embrionados de T.vulpis geraram infec??o em c?es e os valores hematol?gicos permanec eram pr?ximo aos de refer?ncia apesar da infec??o. Ovos de T.vulpis de c?es infectados experimentalmente se desenvolveram at? ovo larvado ap?s estoque sob baixas temperaturas
- Published
- 2012
31. Morpho-Physiological Alterations In Biomphalaria glabrata Say, 1818 (Pulmonata, Planorbidae) Experimentally Infected With Echinostoma paraensei Lie And Basch, 1967 (Trematoda, Echinostomatidae)
- Author
-
Alves, Victor Menezes Tunholi, Rodrigues, Maria de Lurdes de Azevedo, Silva, Jairo Pinheiro da, Brandoline, Solange Viana Paschoal Blanco, and Vidigal , Teofania H. D. A.
- Subjects
homeostasis ,Biompalaria glabrata ,Echinostoma paraensei ,homeostase ,Medicina Veterin?ria - Abstract
Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2020-06-25T18:20:31Z No. of bitstreams: 1 2012 - Victor Menezes Tunholi Alves.pdf: 4892646 bytes, checksum: dd22f6fc221412b2e9ad95acd60388d4 (MD5) Made available in DSpace on 2020-06-25T18:20:31Z (GMT). No. of bitstreams: 1 2012 - Victor Menezes Tunholi Alves.pdf: 4892646 bytes, checksum: dd22f6fc221412b2e9ad95acd60388d4 (MD5) Previous issue date: 2012-02-27 Funda??o Carlos Chagas Filho de Amparo ? Pesquisa do Estado do RJ - FAPERJ Parasites belonging to the Echinostoma genus are characterized by having a complex biological cycle, with two intermediate hosts and a final habitat restricted to the intestinal lumen of the definitive hosts. These hosts include aquatic birds, mammals (including humans) and occasionally some reptile and fish species. Their first intermediate hosts are freshwater snails, into which the miracidia actively penetrate for development of the next three stages (sporocysts, rediae and cercariae). Freshwater crustaceans, amphibians, fish and snails act as the second intermediate hosts, enabling the formation of metacercariae, the infective larval stage to the definitive host. In this work, Biomphalaria glabrata specimens were experimentally infected with different doses (5 or 50) of E. paraensei miracidia. The snails were dissected one, two, three and four weeks after infection to collect the hemolymph, shells and tissues (gonad-digestive gland complex- GDG). During this period, the snails? oviposition was observed. In the hemolymph, the concentrations of total proteins, urea, uric acid, cholesterol and triglycerides were measured, as well as the activities of the transaminases (ALT and AST). In the tissues, the levels of neutral lipids (fatty acids, triglyceride, cholesterol and esterified cholesterol) were measured, and in the shells the CaCO3 content was quantified. Significant differences were observed in the bioenergy state of the snails infected with both miracidium doses in relation to the control group (not infected), probably because of the intense formation of glucogenic amino acids from the protein catabolism in response to the stress generated by the parasites. Because of the high energy consumption of the infected snails, it is possible that the anaerobic metabolism becomes more active, culminating in the accumulation of organic acids that reduce the pH of the hemolymph, thus explaining the significant increase in calcemia. In parallel, accentuated decreases in the calcium levels in the shells were found in the snails infected by both miracidium doses (5 and 50), which coincided with the peak calcemia in these specimens. Drastic declines in the total protein concentration in the hemolymph were observed in the infected snails, related to the probable increase of the activities of the transaminases (ALT and AST), an effect also caused by the appearance of rediae and corroborated by the accumulation of uric acid and urea. Additionally, the significant alteration of the lipid profile of the infected snails indicates intense utilization of lipids as a substrate both by the intermediate host and the parasite, suggesting the probable participation of lipids in the energy and structural metabolism of both organisms. The results observed in this study indicate that infection with 5 or 50 E. paraensei miracidia caused considerable metabolic changes in B. glabrata, with the snails exposed to the higher number of miracidia suffering greater damage. Com ciclo biol?gico complexo, os parasitos pertencentes ao g?nero Echinostoma, caracterizam-se por apresentar o h?bitat restrito ? luz intestinal dos hospedeiros definitivos, na qual se destacam as aves aqu?ticas, mam?feros, incluindo o homem, e ocasionalmente algumas esp?cies de r?pteis e peixes. Possuem como primeiro hospedeiro intermedi?rio moluscos l?mnicos, onde os mirac?dios penetram ativamente e desenvolvem at? as fases de cerc?rias e crust?ceos, anf?bios, peixes e moluscos l?mnicos como segundo hospedeiro intermedi?rio onde ocorre a forma??o de metacerc?rias, fase infectante ao hospedeiro definitivo. Neste estudo, Biomphalaria glabrata foi infectada com diferentes doses miracidiais (5 ou 50) de E. paraensei e ap?s uma, duas, tr?s e quatro semanas de infec??o os moluscos foram dissecados para a coleta da hemolinfa, conchas e tecidos (complexo g?nadagl?ndula digestiva- GGD). Observou-se a oviposi??o dos moluscos. Na hemolinfa foram dosadas prote?nas totais, ur?ia, ?cido ?rico, c?lcio, colesterol e triacilglicerol, bem como as atividades das transaminases (ALT e AST). Nos tecidos foram mensurados os conte?dos de lip?deos neutros (?cidos graxos, triacilglecerol, colesterol e colesterol esterificado) e nas conchas, quantificados os conte?dos de carbonato de c?lcio (CaCO3). Diferen?as significativas foram observadas no estado bioenerg?tico dos moluscos infectados com ambas as doses miracidiais em rela??o ao grupo controle (n?o-infectado), provavelmente em consequ?ncia da intensa forma??o de amino?cidos gliconeog?nicos a partir do catabolismo prot?ico em resposta ao estresse gerado pelo parasitismo. O aumento da calcemia pode ser justificado devido ao alto consumo energ?tico nos moluscos infectados, onde o metabolismo anaer?bico pode estar mais ativo culminando com o ac?mulo de ?cidos org?nicos que diminuem o pH da hemolinfa. Simultaneamente, acentuados decr?scimos dos conte?dos de c?lcio nas conchas foram constatados em B. glabrata infectadas por ambas as doses miracidiais (5 e 50) de E. paraensei, o que coincidiu com o pico da calcemia nestes mesmos organismos. Diminui??es no conte?do de prote?nas totais na hemolinfa dos organismos infectados foram observadas, relacionando-se com o prov?vel aumento das vias gliconeog?nicas. Este consumo prot?ico ? confirmado pelo aumento das atividades das transaminases (ALT e AST), efeito tamb?m decorrente ao aparecimento de r?dias no molusco, bem como, ratificado pelo ac?mulo de ?cido ?rico e ur?ia. Aumentos significativos na oviposi??o tamb?m foram evidenciados. Em adi??o, a significativa altera??o no perfil lip?dico dos moluscos infectados indica intensa utiliza??o desse substrato tanto pelo hospedeiro intermedi?rio quanto pelo parasito, sugerindo sua prov?vel participa??o no metabolismo energ?tico e estrutural. Os resultados observados neste estudo indicam que a infec??o com cinco ou 50 mirac?dios de E. paraensei provocou consider?veis altera??es metab?licas em B. glabrata, sendo que os moluscos expostos a maior carga miracidial apresentaram os maiores danos, caracterizando uma resposta dose-dependente.
- Published
- 2012
32. Characterization of the biochemical profile and reproductive biology of Biomphalaria glabrata Say, 1818 (Mollusca, Gastropoda) experimentally infected with Angiostrongylus cantonensis, (Nematoda, Metastrongylidae)
- Author
-
Alves, Vin?cius Menezes Tunholi, Silva, Jairo Pinheiro da, Thiengo, Silvana Aparecida Rogel Carvalho, Rodrigues, Maria de Lurdes de Azevedo, and Maldonado Junior, Arnaldo
- Subjects
altera??es bioqu?micas ,Angiostrongylus cantonensis ,biochemical change ,host parasite relationship ,rela??o parasito-hospedeiro ,Biomphalaria glabrata ,Medicina Veterin?ria - Abstract
Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2020-06-23T13:40:03Z No. of bitstreams: 1 2012 - Vin?cius Menezes Tunholi Alves.pdf: 2634381 bytes, checksum: 16f203fa536967e841695a147d3b609a (MD5) Made available in DSpace on 2020-06-23T13:40:03Z (GMT). No. of bitstreams: 1 2012 - Vin?cius Menezes Tunholi Alves.pdf: 2634381 bytes, checksum: 16f203fa536967e841695a147d3b609a (MD5) Previous issue date: 2012-02-27 Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico, CNPq, Brasil The nematode Angiostrongylus cantonensis (Chen, 1935) is a parasite of rodent lungs, first described in wild rats by Cheng. It is a zoonotic pathogen that occasionally causes human eosinophilic meningoencephalitis. The life cycle of this nematode always involves the participation of snails as intermediate hosts. Currently Brazil is considered an area of high risk for the establishment of human angiostrongyliasis, due mainly to the occurrence of naturally infected snails and rodents, favoring the establishment of this disease?s cycle. In recent years, the metabolic characteristics of experimentally infected snails have been studied in an effort to develop measures to control the pathologies transmitted by these organisms. However, there has yet to be any research on the interaction of A. cantonensis and Biomphalaria glabrata (Say, 1818), which is cause for concern, not only because of the importance of this parasite, but also due to the widespread distribution of the freshwater snail B. glabrata in Brazil. In this study, the metabolic alterations of B. glabrata resulting from experimental infection by A. cantonensis were evaluated. For this purpose, snails of the pigmented strain were used, reared in the laboratory since oviposition. Two overall groups were formed: control (C1, C2 and C3), with uninfected animals, and treated (I1, I2 and I3), with infected snails. Each subgroup was composed of 10 snails. The entire experiment was performed in duplicate, utilizing a total of 120 snails. After one, two and three weeks of infection, 20 snails from each group were dissected to collect the hemolymph and tissues. The spectrophotometric readings were performed with Doles commercial reagent kits. The biochemical doses demonstrated a significant decrease in the hemolymphatic levels of glucose, proteins and uric acid and an increase in the level of urea and the enzymatic activity of lactate dehydrogenase (LDH), alanine aminotransferase (ALT) and aspartate aminotransferase (AST) of the infected groups in relation to the control groups. Variations in the polysaccharide reserves were also observed, with the infected groups having lower glycogen reserves in the cephalopediose mass and digestive gland, and lower levels of galactogen in the albumen gland, indicating impairment of the infected snails? nutritional state. Together the results confirm the involvement of adaptive biochemical mechanisms, characterized mainly by the activation of the protein metabolism in the infected snails, which start to use non-glycidic sources to produce energy. As a consequence, there is an accumulation of catabolites from protein metabolism, which can partly explain the higher concentrations of urea in the hemolymph of the infected animals. Besides this, the greater activity of the enzyme centers in the infected organisms suggests, for LDH, the probable involvement of a fermentative route in the production of energy, and in the case of the transaminases (ALT and AST), an important association between protein metabolism and synthesis of new glucose, enabling the formation of -ceto acids from glycogenic amino acids. Additionally, alterations in the reproductive biology of B. glabrata infected by A. cantonensis reveal the occurrence of parasite castration, probably as a result of the inanition observed during the infection process. O nemat?ide Angiostrongylus cantonensis (Chen, 1935) ? parasito de pulm?es de roedores, primeiramente descrito em ratos silvestres por Cheng em 1935. Trata-se de um agente zoon?tico, o qual causa angiostrongil?ase humana. O ciclo de vida deste nemat?ide envolve obrigatoriamente a participa??o de moluscos como hospedeiros intermedi?rios e crust?ceos, anf?bios, peixes e r?pteis como hospedeiros parat?nicos. Atualmente, o Brasil ? considerado uma ?rea de alto risco ao estabelecimento da angiostrongil?ase humana, justificado pela ocorr?ncia de moluscos, especialmente o caramujo africano, Achatina fulica (Bowdich, 1822), e roedores naturalmente infectados, fatores que favorecem diretamente a instala??o do ciclo desta doen?a. Nos ?ltimos anos, a caracteriza??o de padr?es metab?licos de moluscos infectados experimentalmente, tem sido estudada como base para o desenvolvimento de medidas focadas principalmente no controle de agentes transmitidos por estes organismos. Por?m, quando nos referimos a modelos experimentais utilizando A. cantonensis e Biomphalaria glabrata (Say, 1818), os dados ainda n?o foram caracterizados, o que preocupa, n?o apenas pela import?ncia do parasito, mas tamb?m pela ampla distribui??o da esp?cie B. glabrata no Brasil. Neste estudo, pela primeira vez foram avaliadas as altera??es metab?licas de B. glabrata, decorrentes da infec??o esperimental por A. cantonensis. Para isso, foram utilizados moluscos da linhagem mel?nica criados desde a oviposi??o e mantidos em condi??es laboratoriais. Foram formados dois grupos: controle (C1, C2, C3) com animais n?o infectados e infectados (I1, I2 e I3). Os grupos eram compostos por 10 moluscos. Todo experimento foi feito em duplicata, utilizando um total de 120 moluscos. Ap?s 1, 2 e 3 semanas de infec??o, 20 moluscos de cada grupo eram dissecados para a coleta da hemolinfa e tecidos. As leituras espectrofotom?tricas foram realizadas a partir de kits comercias da marca Doles. As dosagens bioqu?micas demonstraram uma diminui??o significativa nos conte?dos hemolinf?ticos de glicose, prote?nas e ?cido ?rico e um aumento nos conte?dos de ureia e na atividade enzim?tica da lactato desidrogenase (LDH), alanina aminotransferase (ALT) e aspartato aminotranferase (AST) dos grupos infectados em rela??o ao grupo controle. Varia??es nas reservas polissacar?dicas tamb?m foram demonstradas, com os grupos infectados apresentando uma diminui??o nas reservas de glicog?nio da massa cefalopediosa, gl?ndula digestiva e de galactog?nio na gl?ndula de alb?men, indicando um comprometimento do estado nutricional do molusco. Juntos, os resultados confirmam o envolvimento de mecanismos bioqu?micos homeost?ticos, caracterizados principalmente pela ativa??o do metabolismo prot?ico nos moluscos infectados, que passam a utilizar fontes n?o glic?dicas para a produ??o de energia. Como consequ?ncia, um ac?mulo de catab?litos do metabolismo prot?ico foi observado, o que poderia explicar em parte, as maiores concentra??es de ureia na hemolinfa de animais infectados. Al?m disso, a maior atividade de centros enzim?ticos nos organismos infectados sugere para LDH o prov?vel envolvimento de uma via fermentativa na produ??o de energia, e no caso das transaminases (ALT e AST) uma importante associa??o entre o metabolismo prot?ico e a s?ntese de nova glicose, possibilitando a forma??o de -ceto?cidos a partir de amino?cidos gliconeog?nicos. Adicionalmente, altera??es na biologia reprodutiva de B. glabrata infectada por A. cantonensis revelam a viii ocorr?ncia do fen?meno de castra??o parasit?ria indireta, provavelmente como consequ?ncia ao estado de inani??o observado durante o processo de infec??o.
- Published
- 2012
33. Biologic control of gastrointestinal nematodes of ovine, eggs of Trichuris trichiura, Trichuris vulpis and Anoplocephala perfoliata by nematophagous fungi
- Author
-
Silva, André Ricardo e, Benjamin, Laércio dos Anjos, Silva Júnior, Abelardo, Araújo, Jackson Victor de, Bittencourt, Vânia Rita Elias Pinheiro, Zanuncio, José Cola, Rodrigues, Maria de Lurdes de Azevedo, and Serrão, José Eduardo
- Subjects
Sheep ,Biological control ,Fungos nematófagos ,CIENCIAS AGRARIAS::MEDICINA VETERINARIA::MEDICINA VETERINARIA PREVENTIVA::DOENCAS INFECCIOSAS DE ANIMAIS [CNPQ] ,Controle biológico ,Nematophagous fungi ,Ovinos - Abstract
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Gatrointetistinal helminthosis cause damage and can kill ruminants and other animals, including man. The indiscriminate use of anthelminthic caused the selection of populations of helminthes resistant to different chemical groups used. Nematophagous fungi are used in the biological control of gastrointestinal helminthosis, such as Duddingtonia flagrans, Monacrosporium thaumasium and Pochonia chlamydosporia. In the first experiment, sheep were treated with pellets with nematophagous fungi D. flagrans and M. thaumasium evidencing that the fungus can be used as an alternative for control of ovine gastrointestinal nematodiosis. In the second experiment, D. flagrans (AC001 isolate) and M. thaumasium (NF34a isolate) were efficient in controlling in vitro larvae in the third stage (L3) of Haemonchus contortus of ovine and can be used in the biological control of this nematode. In the third experiment, isolates of P. chlamydosporia (VC1 and VC4) had an important role in the destruction of eggs of human Trichuris trichiura. In addition, fungi D. flagrans (AC001) and M. thaumasium (NF34a) preyed L3 of H. contortus, but no predation by P. chlamydosporia was found. Thus, isolates of P. chlamydosporia (VC1 and VC4) can be potential biological controllers of Trichuris trichiura in humans and D. flagrans (AC001) and M. thaumasium (NF34a) of H. contortus for ovine. In the fourth experiment, isolates of P. chlamydosporia (VC1 and VC4) showed ovicidal activity (p < 0.05) in eggs of T. vulpis of dogs. Fungi of D. flagrans (AC001) and M. thaumasium (NF34a) did not show ovicidal effect, but P. chlamydosporia is a potential agent for biological control of T. vulpis eggs in dogs. In the fifth experiment, isolate of nematophagous fungi P. chlamydosporia (VC1) destroyed eggs of Anoplocephala perfoliata in horses. D. flagrans (AC001) and M. thaumasium (NF34a) were effective in controlling gastrointestinal nematodioisis of ovine and P.chlamydosporia isolates (VC1 e VC4) destroyed eggs of T. trichiura in humans and T. vulpis of dogs. The isolate (VC1) destroyed eggs of A. perfoliata in horses. As helmintoses gastrointestinais provocam danos e podem matar ruminantes e outros animais, incluindo o homem. O uso indiscriminado de anti-helmínticos provocou a seleção de populações de helmintos resistentes aos diferentes grupos químicos utilizados. Fungos nematófagos, como Duddingtonia flagrans, Monacrosporium thaumasium e Pochonia chlamydosporia são utilizados no controle biológico das helmintoses gastrintestinais. No primeiro experimento, ovelhas foram tratadas com péletes contendo D. flagrans e M. thaumasium evidenciando que esses fungos podem ser usados como uma alternativa para o controle das nematodioses gastrintestinais de ovinos. No segundo experimento, D. flagrans (isolado AC001) e M. thaumasium (isolado NF34a) foram eficazes no controle in vitro de larvas de 3° estágio (L3) de Haemonchus contortus de ovinos e podem ser usados no controle biológico desse nematóide. No terceiro experimento, isolados de P. chlamydosporia (VC1 e VC4) tiveram papel importante na destruição de ovos de Trichuris trichiura de humanos. Além disso, em outro ensaio os fungos D. flagrans (AC001) e M. thaumasium (NF34a) predaram L3 de H. contortus de ovinos, mas nenhuma predação pelo fungo P. chlamydosporia foi observada. Os isolados de P. chlamydosporia (VC1 e VC4) podem ser controladores biológicos potenciais de Trichuris trichiura de humanos e os fungos D. flagrans (AC001) e M. thaumasium (NF34a) de H. contortus de ovinos. No quarto experimento, isolados de P. chlamydosporia (VC1 e VC4) demonstraram atividade ovicida (p < 0,05) em ovos de T. vulpis de cães. Os fungos D. flagrans (AC001) e M. thaumasium (NF34a) não mostraram efeito ovicida, mas P. chlamydosporia é um agente potencial para o controle biológico de ovos de T. vulpis de cães. No quinto experimento, o isolado do fungo nematófago P. chlamydosporia (VC1) destruiu ovos de Anoplocephala perfoliata de equinos. Os fungos D. flagrans (AC001) e M. thaumasium (NF34a) foram efetivos no controle das nematodioses gastrintestinais de ovinos e os isolados VC1 e VC4 de P. chlamydosporia destruíram ovos de T. trichiura de humanos e T. vulpis de cães. O isolado VC1 destruiu ovos de A. perfoliata de equinos.
- Published
- 2011
34. Morphology of eggs and larval stages of Eurytrema coelomaticum (Giard & Billet, 1892) (Digenea, Dicrocoeliidae) and biochemical analyse of interface first intermediate host-parasite, Bradybaena similaris (F?russac, 1821) (Gastropoda, Xanthonychidae)
- Author
-
Acu?a, Daniele de Oliveira Franco, Silva, Jairo Pinheiro da, Brandolini, Solange Viana Paschoal Blanco, Oliveira, Aleksandra Menezes de, Mendes, Rosa Maria Marcos, Rodrigues, Maria de Lurdes de Azevedo, Rossas, Melissa Querido Cardens, and Barros, Luciano Antunes
- Subjects
morfologia ,est?gios larvais intramolusco ,Eurytrema coelomaticum ,morphology ,larval intramolluscan stages ,Medicina Veterin?ria - Abstract
Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2020-09-15T03:59:14Z No. of bitstreams: 1 2011 - Daniele de Oliveira Franco Acu?a.pdf: 19647607 bytes, checksum: 41d2913e215e4bde368931236fdaeb9e (MD5) Made available in DSpace on 2020-09-15T03:59:14Z (GMT). No. of bitstreams: 1 2011 - Daniele de Oliveira Franco Acu?a.pdf: 19647607 bytes, checksum: 41d2913e215e4bde368931236fdaeb9e (MD5) Previous issue date: 2011-07-05 FAPERJ - Funda??o Carlos Chagas Filho de Amparo ? Pesquisa do Estado do Rio de Janeiro Eurytrema coelomaticum parasitizes pancreatic ducts of ruminants in South America, Europa and Asia. The present study aimed analyze the morphology of eggs and larval intramolluscan stages of E. coelomaticum and biochemical alterations in the hemolymph of infected Bradybaena similaris. Eggs, sporocysts and cercariae were collected, processed and analyzed by light (LM), scanning (SEM) and transmission (TEM) electron microscopy, being the miracidia observed only by LM. Biochemical analyzes of total protein, ammonium and AST, ALT and ?GT activities in the hemolymph of infected and uninfected snails were made. Eggs were operculated, elongated, dark brownish when mature, with 44.97?3.83?m lengthand 30.71?2.54?m width. Miracidium had an anteroposterior elongated and ciliated body, the terebratorium was anteriorly located and germinal cells were observed in the middle body. The mother sporocysts had rounded or elongated body (0.1078mm), with numerous germinal balls inside them and tegument without evident specializations, presenting many foldings and granules. The tegument was composed by a syncytial external layer, basal lamina and two muscular layers, circular and longitudinal, followed by the cyton with the nucleus. Daughter sporocysts, came from dissecations of infected snails, presented varied shape, a hollow tapered region with many transversal and longitudinal striations, named anterior end, and other region with a filament proboscis-like shape, the posterior end. The body wall is composed by the same layers observed in the mother sporocysts, but the external syncytial layer invaginates and an amorphous layer is also present between syncytial and circular muscular layers; intense secretory activity with granules and secretory vesicles were observed in the external layer; excretory system is protonephridial. Expelled sporocysts exhibit a degenerated structure at anterior and posterior regions of the body; the middle region was swollen. The endocyst had a fibrilar wall and includes the cercariae, amorphous, membranous and secretory materials. Cercariae presented oral sucker with many papillae than in the ventral sucker or acetabulum, spines at the tegument or tail were absent; the penetration glands were lateral and preacetabular and open themselves in a anterior cavity. The lateral flame-cells comunicate with fine branches that converge on two excretory ducts, which open in the posterior excretory vesicle. Tegument had an external syncytial layer followed by an amorphous layer with many mitochondria and an intense secretory activity. Circular muscular layer and, right after, the cyton, with the nucleus, is located. Typical flame-cell was observed. Somatic cells with a well developed smooth endoplasmic reticulum, secretory granules and evident nucleus. The total protein content in the hemolymph increased 543% at 82 days of infection, but at 100 days of infection there was a sharp reduction in these values, whose were significantly different from the values observed to control (uninfected) snails. Ammonium content varied significantly throughout period of infection, except at 60 days of infection, when the both groups were compared. The activity of aminotransferases (AST, ALT e ?GT) suggested that these parameters are not good indicators of injuries in the tissues host. Eurytrema coelomaticum parasita ductos pancre?ticos de ruminantes na Am?rica do Sul, Europa e ?sia. Este estudo objetivou analisar a morfologia dos ovos e est?gios larvais intramolusco de E. coelomaticum e as altera??es bioqu?micas em Bradybaena similaris ocasionadas pela infec??o. Os ovos, esporocistos e cerc?rias foram coletados, processados e analisados atrav?s de microscopia de luz (ML), eletr?nica de varredura e transmiss?o, sendo os mirac?dios observados apenas por ML. An?lises bioqu?micas foram realizadas, determinando os conte?dos de prote?nas totais, am?nio e atividade da AST, ALT e ?GT na hemolinfa de moluscos infectados e n?o infectados. Ovos s?o operculados, alongados, de colora??o marrom escura quando maduros, com 44,97?3,83?m de comprimento e 30,71?2,54?m de largura. Mirac?dio com corpo alongado no sentido antero-posterior coberto por c?lios, presen?a de terebratorium na regi?o anterior e c?lulas germinativas na metade posterior do corpo. Os esporocistos de primeira gera??o tinham corpo arredondado ou alongado (0,1078mm), com numerosas bolas germinativas em seu interior e tegumento sem especializa??es evidentes, apresentando dobras e gr?nulos, sendo composto por uma camada sincicial externa, l?mina basal e duas camadas musculares, circular e longitudinal, seguida pelo corpo celular (c?ton) com o n?cleo. Esporocistos de segunda gera??o, obtidos de disseca??es dos moluscos, apresentaram formato variado, uma regi?o c?nica com estria??es transversais e longitudinais, chamada de extremidade anterior e outra com um prolongamento, semelhante ? prob?scide, a extremidade posterior. A parede do corpo com as mesmas camadas do esporocisto de primeira gera??o, mas a camada sincicial externa invagina e uma camada amorfa est? presente entre as camadas sincicial e de m?sculos circulares, intensa atividade secret?ria com gr?nulos e ves?culas secretoras na camada externa; sistema excretor protonefridial. Esporocistos expelidos exibem uma estrutura degenerada nas regi?es anterior e posterior do corpo; regi?o mediana inchada. O endocisto de parede fibrilar inclui as cerc?rias, material amorfo, membranoso e secret?rio. Cerc?rias apresentam ventosa oral com um n?mero de papilas maior do que a ventosa ventral, aus?ncia de espinhos no tegumento e na cauda, com gl?ndulas de penetra??o laterais e pr?-acetabulares com ductos que se abrem em uma cavidade na extremidade anterior. As c?lulasflama laterais se comunicam com finas ramifica??es que convergem para dois ductos excretores, os quais se abrem na ves?cula excretora posterior. Tegumento com uma camada externa sincicial e amorfa com mitoc?ndrias e intensa atividade secretora. Camada muscular circular seguida pela longitudinal e, em sequ?ncia, conectada ? regi?o interna do tegumento, onde est? o corpo celular com o n?cleo. Presen?a de c?lula-flama t?pica. C?lulas som?ticas com ret?culo endoplasm?tico bem desenvolvido, gr?nulos secretores e n?cleo evidente. O conte?do de prote?nas totais aumentou em 543% aos 82 dias na hemolinfa dos moluscos infectados, por?m aos 100 dias de infec??o houve uma queda brusca nesses valores, com diferen?a significativa entre os grupos, infectado e controle. A concentra??o de am?nio na hemolinfa dos moluscos variou significativamente ao longo da infec??o, exceto aos 60 dias, quando comparados os dois grupos estudados. A an?lise da atividade das aminotransferases (AST, ALT e ?GT) sugere que os par?metros n?o s?o bons indicadores de les?o nos tecidos do hospedeiro.
- Published
- 2011
35. Cyathostomin nematode: evaluation of the development of eggs at low temperatures and the effect of plant extracts on the pre-parasitic
- Author
-
Souza, Luciene Soares de, Rodrigues, Maria de Lurdes de Azevedo, Borba, Helcio Resende, Bevilaqua, Claudia Maria Leal, and Silva, Cl?lia Christina Correa de Mello
- Subjects
storage ,plant extracts ,extratos vegetais ,cyathostomin ,ciatostom?neos ,Medicina Veterin?ria ,armazenamento - Abstract
Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2020-07-28T17:51:57Z No. of bitstreams: 1 2011 - Luciene Soares de Souza.pdf: 1626887 bytes, checksum: 60cd70513d5290267cf2ef8c4ba9ba27 (MD5) Made available in DSpace on 2020-07-28T17:51:58Z (GMT). No. of bitstreams: 1 2011 - Luciene Soares de Souza.pdf: 1626887 bytes, checksum: 60cd70513d5290267cf2ef8c4ba9ba27 (MD5) Previous issue date: 2011-02-24 Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior, CAPES, Brasil. The cyathostomin (Cyathostominae) are the most abundant nematodes in the large intestine of horses. Due to problems with increasing parasite resistance to anthelmintics has been growing concern about the effect of medicinal plants in order to find new and alternative methods to control the prevalence and severity of infections cyathostomin. The effect of temperature on egg development of cyathostomin and storage time of the stool are poorly studied, and this is the first study performed in vitro under storage conditions at low temperatures. The aim of this study was evaluated the development of eggs recovered from faeces, kept under different temperatures and test the effect of plant extracts on the eggs, first stage larvae (L1) and infective larvae (L3) cyathostomin, divided into two chapters. The first chapter deals with the evaluation of the influence of low temperatures on egg development until the first larval stage (L1) and third larval stage (L3), divided into four experiments with changes in the methodology. For the execution of experiments, feces were collected directly from horses not dewormed. Later they were made to count eggs per gram (EPG) to estimate the parasite load of each donor animal and stool cultures for identification of L3. The total mass was homogenized and samples were kept undisclosed stored under different temperatures: refrigeration (?10?C) and congelation (-4?C) during the duration of each experiment. Weekly or fortnightly, depending on the methodology used in the experiment, eggs (?300) were recovered and kept in petri dishes at room temperature (?25?C) and observed under an optical microscope (40x) after 24 hours to count the different stages of development of the egg to L1. The L3 were retrieved via coproculture. But the chapter 2 evaluates the effect of aqueous extract of two plants, Solanum lycocarpum and Curatella americana both from Three Marias- MG, on cyathostomin eggs, L1 and L3. Eggs (?400) were recovered from fresh fecal mass, the L1 (?400) after 24 hours of developing eggs, and L3 using the coproculture. The experiments were conducted separately to assess the percentual of inhibition development eggs (% IDO) and the percentual of reduction larval motility (%RML) by the action of extracts in the concentrations of 5, 2,5 and 1% during 24h. This was the first study performed with assessment and observation of developing eggs cyathostomin at low temperatures during the seasons. The studies presented in chapter I observed variation in egg development until the L3 stage in different seasons, in samples kept under ?10?C and -4?C. In Chapter II, it was observed that the aqueous extracts of the plants showed better evaluated larvicidal effect on L1 and had no effect on the eggs ovicidal cyathostomin. It follows that the congelation temperature of the eggs not killed; faecal masses can be stored for a period of 30 days for diagnosis and further studies must be performed in vitro with aqueous extracts of Solanum lycocarpum and Curatella american to verify the potential anthelmintic in other concentrations. Os ciatostom?neos (Cyathostominae) s?o os nemat?ides mais abundantes no intestino grosso dos equinos. Devido aos problemas com o aumento da resist?ncia parasit?ria aos antihelm?nticos, tem crescido o interesse sobre o efeito medicinal das plantas no sentido de encontrar novas alternativas e m?todos para controle da preval?ncia e severidade das infec??es por ciatostom?neos. O efeito da temperatura sobre o desenvolvimento de ovos dos ciatostom?neos e o tempo de armazenamento das fezes s?o pouco estudados, sendo este o primeiro trabalho realizado in vitro sob condi??es de estoque em baixas temperaturas. Este trabalho objetivou avaliar o desenvolvimento de ovos de ciatostom?neos recuperados de fezes mantidas sob diferentes temperaturas e testar o efeito de extratos de plantas sobre as fases pr?paras?ticas desse parasito, sendo dividido em dois cap?tulos. O cap?tulo I trata da avalia??o da influ?ncia de baixas temperaturas sobre o desenvolvimento dos ovos at? o primeiro est?gio larval (L1) e terceiro est?gio larval (L3), sendo dividido em quatro etapas com modifica??es na metodologia. Para a execu??o dos experimentos, fezes foram coletadas diretamente de equinos n?o vermifugados. Posteriormente, foram realizados a contagem de ovos por grama de fezes (OPG) para estimativa da carga parasit?ria de cada animal doador e coproculturas para identifica??o das L3. A massa total foi homogeneizada e as amostras reservadas foram mantidas armazenadas sob diferentes temperaturas: refrigera??o (?10?C) e congelamento (-4?C), durante o per?odo de execu??o de cada experimento. Semanalmente ou quinzenalmente, conforme a metodologia adotada no experimento, ovos (?300) foram recuperados e mantidos em placas de petri ? temperatura ambiente (?25?C), sendo observados ao microsc?pio ?ptico (40x) ap?s 24h para contagem das diferentes fases de desenvolvimento do ovo at? L1. As L3 foram recuperadas por meio de coproculturas. O cap?tulo II tratou da avalia??o do efeito do extrato aquoso de duas plantas, Solanum lycocarpum e Curatella americana, sobre ovos, L1 e L3 de ciatostom?neos. Ovos foram recuperados (?400) de massa fecal fresca, as L1 (?400) ap?s 24h, e as L3 atrav?s da t?cnica de coprocultura. Os experimentos foram conduzidos separadamente, a fim de avaliar o percentural de inibi??o do desenvolvimento dos ovos (%IDO) e o percentual de efic?cia na mortalidade larval (%LM) pela a??o dos extratos em tr?s diferentes concentra??es (5, 2,5 e 1%) durante 24h. Esse foi o primeiro trabalho realizado com avalia??o e observa??o do desenvolvimento de ovos de ciatostomineos em baixas temperaturas, durante as esta??es. Atrav?s dos estudos apresentados no capitulo I observou-se varia??o no desenvolvimento dos ovos at? o est?gio de L3 nas diferentes esta??es, em amostras mantidas sob ?10?C e -4?C. No capitulo II, observou-se que os extratos aquosos das plantas avaliadas apresentaram melhor efeito larvicida sobre as L1 e n?o apresentaram efeito ovicida sobre os ovos de ciatostom?neos. Conclui-se que a temperatura de congelamento n?o matou os ovos; as massas fecais podem ser estocadas por um per?odo de 30 dias para diagn?sticos e mais estudos precisam ser realizados in vitro com extratos aquosos da Solanum lycocarpum e Curatella americana, a fim de verificar o potencial anti-helm?ntico em outras concentra??es.
- Published
- 2011
36. Evaluation of parasitic fauna of Prochilodus argenteus Spix & Agassiz, (Pisces, Prochilodontidae) of the Upper S?o Francisco, Minas Gerais, Brazil
- Author
-
Monteiro, Cassandra de Moraes, Brasil-Sato, Marilia de Carvalho, Tavares, Luiz Eduardo Roland, Sampaio, Edson Vieira, Knoff, Marcelo, Borba, H?lcio Resende, and Rodrigues, Maria de Lurdes de Azevedo
- Subjects
parasitos ,rio S?o Francisco ,?gua doce ,S?o Francisco river ,parasites ,freshwater ,Medicina Veterin?ria - Abstract
Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2020-09-18T17:54:54Z No. of bitstreams: 1 2011 - Cassandra de Moraes Monteiro.pdf: 56040138 bytes, checksum: 2d281d8bcfbde20bc44e5db08f409df4 (MD5) Made available in DSpace on 2020-09-18T17:54:57Z (GMT). No. of bitstreams: 1 2011 - Cassandra de Moraes Monteiro.pdf: 56040138 bytes, checksum: 2d281d8bcfbde20bc44e5db08f409df4 (MD5) Previous issue date: 2011-02-22 Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior, CAPES, Brasil. Specimens of Prochilodus argenteus (Actynopterygii: Prochilodontidae) were collected in the upper S?o Francisco River, downstream from the Tr?s Marias Dam and downstream of the confluence of the Abaet? River with the San Francisco between 2004 and 2008 during periods of dry and rain. We found 34 species of parasites: adult specimens of Saccocoelioides nanii; Anacanthoroides sp. Apedunculata discoidea; Telethecium sp; Tereancistrum ornatus; Tereancistrum toksonum; Tereancistrum sp.1, sp.2, sp.3 and sp4.; Rhinonastes sp.; Guyanema sp.; Philometra sp.; Philometrioides sp.; Spinitectus asperus; Neoechinorhynchus prochilodorum; Acusicola sp.; Argulus multicolor; Dolops nana; Gamidactylus sp. Placobdella and unidentified copepod sp. and larval specimens of Henneguya sp. Myxobolus franciscoi; Myxobolus sp.1 sp.2; Acanthostomum sp.; Austrodiplostomum sp.; metacestode sp.2 and sp.1; Valipora sp.; Contracaecum sp.; Hysterothylacium sp. and Lernaea sp.. Associations were found between different pairs of species, thus were inferred that the presence of a species favored the presence and increased abundance of others. Among the biotic factors, sex of the hosts did not influence the prevalence, intensity and abundance indexes of ecological infrapopulations or diversity, dominance and evenness, ecological indexes infracommunity. The standard length and body weight showed a weak negative correlation with some indices and ecological communities of hosts smaller and lighter were characterized by greater richness and lower dominance. The relative condition factor and the coefficient of growth when compared with the default values of the collection site showed no changes in infected individuals collected downstream of the dam of Three Marias, but these proved to be decreased in infected fish collected downstream from the confluence of the river San Francisco with the Abaet? River. Hosts from the two locations and collection periods showed different parasitological indexes, and those collected downstream from the Tr?s Marias dam during the dry period were most affected by this phenomenon. It is likely that these differences are linked to differences in the dist composition in different locations and collection periods. Limnological conditions different between the two sites and then modulate the reproduction of P. argenteus and may be relevant factors in determining patterns of parasitism. Additional studies about migration conducted by the populations of P. argenteus are necessary to better understand the parasitism and its variations in this region. Esp?cimes de Prochilodus argenteus (Actynopterygii: Prochilodontidae) foram coletados no alto rio S?o Francisco, ? jusante da barragem de Tr?s Marias e ? jusante da conflu?ncia do rio Abaet? com o rio S?o Francisco entre 2004 e 2008 durante os per?odos de estiagem e chuvoso. Foram encontradas 34 esp?cies de parasitos: esp?cimes adultos de Saccocoelioides nanii; Anacanthoroides sp.; Apedunculata discoidea; Telethecium sp; Tereancistrum ornatus; Tereancistrum toksonum; Tereancistrum sp.1, sp.2, sp.3 e sp4.; Rhinonastes sp.; Guyanema sp.; Philometra sp.; Philometrioides sp.; Spinitectus asperus; Neoechinorhynchus prochilodorum; Acusicola sp.; Argulus multicolor; Dolops nana; Gamidactylus sp.; cop?pode n?o identificado e Placobdella sp. e esp?cimes larvais de Henneguya sp.; Myxobolus franciscoi; Myxobolus sp.1 e sp.2; Acanthostomum sp.; Austrodiplostomum sp.; Metacest?ide sp.1 e sp.2; Valipora sp.; Contracaecum sp.; Hysterothylacium sp.e Lernaea sp.. Foi encontrada associa??o entre diversos pares de esp?cies, assim podemos inferir que a presen?a de uma esp?cie favoreceu a presen?a e o aumento da abund?ncia das demais. Dentre os fatores bi?ticos, o sexo dos hospedeiros n?o influenciou a preval?ncia, a intensidade e a abund?ncia, ?ndices ecol?gicos das infrapopula??es, nem a diversidade, a domin?ncia e a equitabilidade, ?ndices ecol?gicos das infracomunidades. O comprimento padr?o e o peso corporal apresentaram correla??o negativa fraca com alguns dos ?ndices ecol?gicos e as comunidades dos hospedeiros menores e mais leves foram caracterizadas por maior riqueza e menor domin?ncia. O fator de condi??o relativo e o coeficiente de crescimento quando comparados com os valores padr?o da localidade de coleta n?o apresentaram altera??es nos indiv?duos parasitados coletados ? jusante da barragem de Tr?s Marias, mas estes mostraram-se diminu?dos em peixes parasitados coletados ? jusante da conflu?ncia do rio S?o Francisco com o rio Abaet?. Hospedeiros provenientes das duas localidades e per?odos de coleta apresentaram diferentes ?ndices parasit?rios, sendo aqueles coletados ? jusante da barragem de Tr?s Marias durante a estiagem os mais acometidos por este fen?meno. ? prov?vel que estas diferen?as estejam ligadas a diferen?as na composi??o da dieta dos hospedeiros nas diferentes localidades e per?odos de coleta. Condi??es limnol?gicas distintas entre as duas localidades modularam a reprodu??o de P. argenteus e podem ser fatores relevantes na determina??o de padr?es de parasitismo. Estudos complementares a respeito das migra??es realizadas pelas popula??es de P. argenteus s?o necess?rios para que seja poss?vel compreender melhor o parasitismo e suas varia??es nesta regi?o.
- Published
- 2011
37. Nematode-trapping fungi in the control of dog s hookworms
- Author
-
Maciel, Alessandro Spalenza, Freitas, Leandro Grassi de, Campos, Artur Kanadani, Araújo, Jackson Victor de, Rodrigues, Maria de Lurdes de Azevedo, and Furlong, John
- Subjects
Dogs ,Cães ,Biological control ,CIENCIAS BIOLOGICAS::PARASITOLOGIA [CNPQ] ,Controle biológico ,Ancylostoma spp - Abstract
The nematodes of the genus Ancylostoma are cosmopolitan endoparasites of dogs that cause various diseases in these animals and also are zoonotic geohelminths that can infect humans from soil. The control of the adult stage of these nematodes is based on the use of anti-helminthic; however, the use of biocontrol agents may be an additional measure reducing the population of preparasitic stages in development in the soil. This is justified by the fact that stray dogs parasitized are primarily responsible for environmental infestation with hookworm eggs transmitted in faeces. Among the biocontrol organisms, it is known that nematode-trapping fungi have been effective against nematodes of domestic animals. In this context, the objective of this study was to test various fungi isolated of predacious fungi, selecting the most infective for use in the control of infective larval form (L3) of Ancylostoma spp. in soil under semi-natural conditions. The Duddingtonia flagrans fungus (Isolate CG768) was considered the most infective due to the reduction in the recovery of the target nematode L3 and by the characteristic of producing many spores of resistance that can survive in soil, prolonging the life of the fungus in the absence of prey. The infectivity of this isolate could be observed in scanning electron micrographs that showed the destruction of L3 of Ancylostoma spp. in about 48 hours after capture. To test the antagonism in the environment it was used a practical and economically viable system of mass production of fungal inoculum in grains of white rice and milled maize. The fungus was incorporated into the soil colonized in milled maize, taking as parameter the concentration of 10,000 chlamydospores/g of soil, previously effective in vitro tests. This approach probably favored the establishment of the antagonist with significant reduction of the target nematode population in untreated soil under semi-natural conditions, showing the potential regulator of this biological agent. Os nematóides do gênero Ancylostoma são endoparasitas cosmopolitas de cães que causam diversas patologias nesses animais e também são geohelmintos zoonóticos que podem infectar o ser humano via solo. O controle do estágio adulto destes nematóides é baseado na utilização de anti- helmínticos, no entanto, o uso de agentes biocontroladores pode ser uma medida complementar reduzindo a população dos estágios pré-parasitários em desenvolvimento no solo. Isto se justifica pelo fato de que cães vadios parasitados são os principais responsáveis pela infestação ambiental com ovos de ancilostomídeos veiculados nas fezes. Dentre os organismos biocontroladores, sabe-se que os fungos nematófagos predadores têm tido eficácia contra os nematóides de animais domésticos. Neste contexto, o objetivo deste trabalho foi testar diversos isolados de fungos predadores, selecionando o mais infectivo para ser utilizado no controle da forma larval infectante (L3) de Ancylostoma spp. no solo sob condições semi-naturais. O fungo Duddingtonia flagrans (Isolado CG768) foi considerado o mais infectivo devido à redução do número de L3 recuperadas e pela característica de produzir numerosos esporos de resistência capazes de sobreviver no solo, prolongando a vida do fungo na ausência da presa. A infectividade deste isolado pôde ser observada em micrografias eletrônicas de varredura que mostraram a destruição completa da L3 de Ancylostoma spp. em cerca 48 horas após a captura. Para testar o seu antagonismo no ambiente foi utilizado um sistema prático e economicamente viável de produção massal de inóculo fúngico em grãos de arroz branco e grãos de milho moído. O fungo foi incorporado ao solo colonizado em grãos de milho moído tendo como parâmetro a concentração de 10.000 clamidósporos/g de solo, efetiva em ensaios in vitro preliminares. Tal abordagem provavelmente favoreceu o estabelecimento do antagonista, havendo redução significativa da população do nematóide alvo em solo não tratado sob condições semi- naturais, mostrando o potencial regulador deste agente biológico.
- Published
- 2009
38. Morphological characterization of infective larvae of Libyostrongylus douglassii and Libyostrongylus dentatus (Nematoda, Trichostrongylidae) and adults of Codiostomum struthionis (Nematoda, Strongylidae) parasite of ostriches (Struthio camelus)
- Author
-
Ederli, Nicole Brand and Rodrigues, Maria de Lurdes de Azevedo
- Subjects
avestruzes ,Libyostrongylus spp ,Codiostomum struthionis ,ostriches ,Medicina Veterin?ria - Abstract
Made available in DSpace on 2016-04-28T20:15:35Z (GMT). No. of bitstreams: 1 2009 - Nicole Brand Ederli.pdf: 1323032 bytes, checksum: 394a97d8f4b106b07b28af4a26a7af8d (MD5) Previous issue date: 2009-02-13 Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES The aim of this work was differentiates infective larvae of Libyostrongylus douglassii, L. dentatus and Codiostomum struthionis allowing the differential diagnosis of those species among fecal cultures. For this, 10 adult ostriches were slaughtered, their proventriculum and caeca ware removed and adult parasites were collected. Females adults of L. douglassii and L. dentatus were separate in five samples of 100 females each. The samples were macerated individually and mixed with sterilized feces and culture fecal was performed to obtaining of infective larvae. Adults parasites of C. struthionis collected in the caeca were washed in saline solution (NaCl 0,09%) and quantified. All the parasites were fixed in A.F.A. for optical microscopy and adults of C. struthionis and infective larvae of Libyostrongylus spp. were fixed in Karnovsky solution for scanning electron microscopy. All proventriculum and 90% of the analyzed caeca were positive to the infection by Libyostrongylus spp. and C. struthionis, respectively. It is possible to distinguish L. douglassii of L. dentatus and C. struthionis by the morphology and length of the larvae sheath tail, that in L. douglassii is short and with acute ending different the other two species that are long and filamentous. For the differential diagnosis between L. dentatus and C. struthionis is more reliable the use of the morphology of the ending of the larvae tail that, in L. dentatus presents a knob in the extremity, this character is not observed in C. struthionis. Like this, this continues being the best parameter for the differentiation among these two species of gastrointestinals nematodes of the ostriches. The differentiation of the infective larvae of L. douglassii, L. dentatus and C. struthionis among fecal cultures will facilitate the diagnosis of this species, by researchers and breeders, favoring the knowledge of the biology of these nematodes. O presente trabalho tem como objetivo diferenciar larvas infectantes de Libyostrongylus douglassii, L. dentatus e Codiostomum struthionis permitindo o diagn?stico diferencial dessas esp?cies atrav?s de culturas fecais. Para isto, 10 avestruzes adultos foram abatidas, seus proventr?culos e cecos removidos e coletado parasitas adultos. F?meas adultas L. douglassii e L. dentatus foram separadas em cinco amostras de 100 f?meas cada. As amostras foram maceradas individualmente e misturadas com fezes secas esterilizadas e foi realizada cultura fecal padr?o para obten??o de larvas infectantes. Parasitas adultos de C. struthionis recolhidos no ceco foram lavados em solu??o fisiol?gica (NaCl 0,09%), quantificados. Todos os parasitas foram fixados em A.F.A. para microscopia ?ptica e adultos de C. struthionis e larvas infectantes de Libyostrongylus spp. foram fixados em solu??o Karnovsky para microscopia eletr?nica de varredura. Todos os proventr?culos e 90% dos cecos analisados estavam parasitados por Libyostrongylus spp. e C. struthionis, respectivamente. ? poss?vel distinguir L. douglassii de L. dentatus e C. struthionis pela morfologia e comprimento da cauda da bainha que em L. douglassii ? curta e com termina??o aguda ao contr?rio das outras duas esp?cies que s?o longas e filamentosas. Para o diagn?stico diferencial entre L. dentatus e C. struthionis ? mais confi?vel a utiliza??o da morfologia da termina??o da cauda da larva que, em L. dentatus apresenta uma protuber?ncia arredondada na extremidade, caractere este n?o observado em C. struthionis. Assim, este continua sendo o melhor par?metro para a diferencia??o entre estas duas esp?cies de nemat?ides gastrintestinais das avestruzes. A diferencia??o das larvas infectantes de L. douglassii, L. dentatus e C. struthionis atrav?s de culturas fecais ir? facilitar o diagn?stico das esp?cies, por pesquisadores e criadores, favorecendo o conhecimento da biologia destes nemat?ides.
- Published
- 2009
39. The effect of irrigation in ecology of cyathostomin infective larvae (Nematoda - Cyathostominae) of horses, in Bermuda grass pasture (Cynodon dactylon) in Serop?dica, RJ, Brazil
- Author
-
Chambarelli, Melissa Carvalho Machado do Couto, Rodrigues, Maria de Lurdes de Azevedo, and Borba, Helcio Resende
- Subjects
coast cross ,Ciatostom?neos ,migra??o ,Cyathostomin ,Bermuda grass ,migration ,Medicina Veterin?ria - Abstract
Made available in DSpace on 2016-04-28T20:15:31Z (GMT). No. of bitstreams: 1 2008 - Melissa Carvalho Machado do Couto Chambarelli.pdf: 767679 bytes, checksum: 28c75b5091c80e9da0651ba953952d51 (MD5) Previous issue date: 2008-02-29 Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES The knowledge of cyathostomin infective larvae population level presents onto pasture is important to epidemiological purposes, estimating parasitic risk infection to horses and helping on setting up integrated control programs. The present study was elaborated in three parts: first is about the migratory dynamic and survival of cyathostomin infective larvae on Bermuda grass pasture for 12 months. Feces and grass samples were collected weekly at 8 a.m., 1 p.m. and 5 p.m. The samples were weighted and processed by Baermann technique. Higher survival of L3 was found at dry season, 15 and 12 weeks on feces and sward respectively, at rainy season the survival was smaller. The infective larvae were recovered during three times and the Kruskal-Wallis test did not present significance among them. At the second part, the ecology of cyathostomin infective larvae was studied for 24 months. During this period, samples of feces and grass (apex and base) were collected weekly. Samples were processed the same way as in the first part of the study. In the feces, cyathostomin L3 survived for up to 15 weeks, with higher recovery during the rainy period (46,228 kg-1.dh) and on the grass for up to 12 weeks. The recovery of L3 was greater during the dry period in the grass base (1,868 kg-1.dh) rather than in the apex (809 kg-1.dh). The L3 migration from feces to grass varied during the period. The last part of the study is about the effect of irrigation on cyathostomin infective larvae migration in Bermuda grass pasture during the four seasons of the year. Fecal masses of naturally infected horses were placed on Bermuda grass pasture at the beginning of each season. Samples of feces and grass were collected every two weeks at 8 a.m. and 5 p.m. until the end of each season from September/2007 to September/2008. Samples were processed the same way as in the first part of the study. The Kruskal-Wallis non parametric test showed a significant difference for L3 recovery in each season. The test did not present significance between the two times sampling. These results suggest that in conditions of Baixada Fluminense tropical climate horses are in permanent risk of infection. O conhecimento do grau de contamina??o das pastagens pelas larvas infectantes de ciatostom?neos ? importante para os prop?sitos epidemiol?gicos, determinando o risco de infec??o para os eq?inos e podendo tamb?m auxiliar no estabelecimento de estrat?gias de controle integrado. O estudo foi elaborado em tr?s partes: a primeira relata o estudo da din?mica migrat?ria e a sobreviv?ncia de larvas infectantes de ciatostom?neos em pastagem coast cross durante 12 meses. Para este estudo foram coletados amostras de fezes e gram?nea com intervalos regulares de sete dias em tr?s hor?rios diferentes (8, 13 e 17 horas). As amostras foram pesadas e processadas segundo a t?cnica de Baermann. A sobreviv?ncia das L3 foi de at? 15 semanas nas fezes e 12 semanas na gram?nea no per?odo seco e de nove e oito semanas respectivamente para o per?odo chuvoso. No per?odo chuvoso, maior n?mero de L3 foi recuperado nas fezes e no per?odo seco na gram?nea. N?o foi observada diferen?a significativa entre os hor?rios de coleta pela an?lise n?o param?trica de Kruskal-Wallis. Na segunda parte experimental foi estudada a ecologia das larvas infectantes de ciatostom?neos por 24 meses. Durante este per?odo, foram realizados coletas semanais de fezes e gram?nea (?pice e base). O processamento das amostras seguiu o mesmo protocolo realizado na primeira parte do experimento. Nas fezes as L3 sobreviveram por at? 15 semanas, ocorrendo uma maior recupera??o das larvas durante o per?odo chuvoso (46.228 kg-1.ms). Na gram?nea, a sobreviv?ncia foi de at? 12 semanas. A recupera??o das L3 foi mais intensa durante o per?odo seco na base (1.868 kg-1.ms) e no ?pice (809 kg-1.ms) da gram?nea. A migra??o das L3 das fezes para a gram?nea variou durante todo o per?odo. A ?ltima parte do estudo observou a migra??o de larvas infectantes de ciatostom?neos em pastagem coast cross irrigada e n?o irrigada durante as quatro esta??es do ano. Massas fecais, de eq?inos naturalmente infectados foram depositadas nos canteiros de coast cross no in?cio de cada esta??o.A amostragem de fezes e gram?nea foi realizada quinzenalmente em dois hor?rios distintos (8 e 17 horas) at? o final de cada esta??o, no per?odo de setembro/2007 a setembro/2008. O processamento das amostras foi o mesmo descrito na primeira parte experimental. O teste n?o param?trico de Kruskal Wallis evidenciou uma diferen?a significativa na recupera??o de larvas infectantes entre as esta??es do ano. N?o foi observada uma varia??o significativa na recupera??o de L3 nos diferentes hor?rios de coleta. Os resultados sugerem que em condi??es tropicais de Baixada Fluminense, RJ os animais est?o em permanente risco de infec??o.
- Published
- 2008
40. Seasonal influence in migratory dynamic and survival of cyathostomin infective larvae of equine in Tifton 85 pasture in Baixada Fluminense, RJ, Brazil
- Author
-
Bezerra, Simone Quinelato, Rodrigues, Maria de Lurdes de Azevedo, and Sato, Marilia de Carvalho Brasil
- Subjects
pasture ,larvas infectantes ,infective larvae ,pastagem ,sazonality ,sazonalidade ,cyathostomin ,ciatostom?neos ,Medicina Veterin?ria - Abstract
Made available in DSpace on 2016-04-28T20:15:31Z (GMT). No. of bitstreams: 1 2008 - Simone Quinelato Bezerra.pdf: 1288089 bytes, checksum: 806c125a6ebd7474f17e8efb57adbc3f (MD5) Previous issue date: 2008-02-29 The knowledge of biology and epidemiology of cyathostomin free living stages have been helping the development of control programs that limitis anthelmintic use. However little is known about environmental larvae dynamics, mainly in tropical climate. Studies about pasture contamination can help to estimate parasitic risks for animals and to set up integrate control programs. The present study was elaborated in three complemented parts: first, it was evaluated the distribution, recovery and survival of cyatostomin infective larvae of equines in feces and pasture during 15 months. Fecal samples were monthly placed on Tifton 85 (Cynodon spp. cv. Tifton 85) pasture, from september of 2003 to september of 2004. Grass and feces were collected weekly, at 8 a.m., 1 and 5 p.m. and processed by Baermann technique. The results indicate that the environmental conditions were favorable for L3 development and survival. In feces, more L3 was recovered during the rainy period and on the grass in dry period. L3 survival was higher in the dry period for feces and grass samples. L3 were recovered during the three times of collection and no significant difference was observed among three times. The second part was more wide-ranging and approaches the distribution, recovery and survival of cyathostomin infective larvae in feces and pasture for february 2005 to march 2007. Seven days after the deposit, sample of feces and grass were collected weekly at 8 a.m., 1 p.m. and 5p.m., from three different field sites. Grass sample was divided into base (0-20 cm) and apex (20-40 cm). The samples were processed by the Baermann technique for L3 recovery. In the rainy period, more infective larvae were recovered on the feces and grass apex. In the dry period, the recovery was higher only on the grass base, as well as the L3 survival on feces and grass. More larvae were recovered at 8 a.m., except from the grass apex, where the highest recovery was at 1 p.m. The third part refers to the seasonal distribution and recovery of cyathostomin infective larvae in feces, pasture and soil. In the beginning of the seasons feces samples were placed on experimental Tifton 85 plot. The collections began one week after deposit, and later every 15 days. L3 recovered were higher in the autumn and winter and smaller in the spring and mainly in the summer. More L3 were recovered in the morning, although no statistic difference has been observed between the collection times in each season. The soil didn't demonstrate to be potential L3 reservoir, seen the low larvae recovery in this study. O conhecimento da biologia e epidemiologia das fases pr?-paras?ticas de ciatostom?neos de eq?inos t?m contribu?do para o desenvolvimento de programas de controle que limitem a utiliza??o de anti-helm?nticos. No entanto, pouco se conhece sobre a din?mica das larvas no ambiente, principalmente nas regi?es de clima tropical. Estudos sobre o grau de contamina??o das pastagens por larvas infectantes de ciatostom?neos podem auxiliar na determina??o do risco de infec??o dos animais e fornecer dados para o estabelecimento de programas de controle integrado. O presente estudo foi dividido em tr?s etapas complementares: na primeira etapa, avaliou-se a distribui??o, recupera??o e sobreviv?ncia de larvas infectantes (L3) de ciatostom?neos de eq?inos nas fezes e na pastagem no per?odo de 15 meses. Massas fecais foram depositadas mensalmente na gram?nea Tifton 85 (Cynodon spp. cv. Tifton 85) no per?odo de setembro de 2003 a setembro de 2004. Gram?nea e fezes foram coletadas a cada sete dias, ?s 8, 12 e 17h e processadas pela t?cnica de Baermann. De acordo com os resultados, as condi??es ambientais foram favor?veis para o desenvolvimento e sobreviv?ncia das L3. Nas fezes, a recupera??o das L3 foi superior durante o per?odo chuvoso e na gram?nea no per?odo seco. A sobreviv?ncia das larvas foi superior no per?odo seco, tanto para as amostras de fezes quanto para as de gram?nea. As L3 foram recuperadas durante os tr?s hor?rios de coleta e n?o se observou diferen?a significativa entre os hor?rios. A segunda etapa foi mais abrangente e aborda o estudo da distribui??o, recupera??o e sobreviv?ncia de larvas infectantes de ciatostom?neos de eq?inos nas fezes e na pastagem no per?odo de fevereiro de 2005 a mar?o de 2007. Sete dias ap?s cada dep?sito de massa fecal foram realizadas coletas de amostras de fezes e gram?nea ?s 8, 13 e 17 h, de tr?s pontos distintos em sentido hor?rio. As amostras de gram?nea coletadas foram divididas em base (0-20 cm) e ?pice (20-40 cm), tendo sido processadas pela t?cnica de Baermann para recupera??o das L3. No per?odo chuvoso, as larvas infectantes foram recuperadas em maior n?mero das fezes e do ?pice da gram?nea. No per?odo seco, a recupera??o foi superior na base da gram?nea, assim como a sobreviv?ncia das L3 nas fezes e na gram?nea. Maior n?mero de larvas foi recuperado ?s 8 h, exceto na base da gram?nea, onde a maior recupera??o de L3 ocorreu ?s 13 h. A terceira parte refere-se ? distribui??o sazonal e recupera??o de larvas infectantes de ciatostom?neos nas fezes, na pastagem e no solo. Ao in?cio de cada esta??o do ano foram depositadas amostras de fezes no canteiro experimental de Tifton 85. As coletas iniciaram-se uma semana ap?s o dep?sito e posteriormente a cada 15 dias. As L3 foram recuperadas em maior quantidade no outono e inverno e em menor quantidade na primavera e principalmente no ver?o. No hor?rio da manh? as larvas foram recuperadas em maior n?mero, embora n?o tenha sido observada diferen?a estat?stica entre os hor?rios de coleta em cada esta??o do ano. O solo n?o demonstrou ser potencial reservat?rio de L3, visto a baixa recupera??o de larvas neste estudo.
- Published
- 2008
41. Helmintofauna de Columba livia (Aves, Columbidae), no munic?pio de Juiz de Fora, Minas Gerais, Brasil: aspectos da ecologia, morfologia e sistem?tica
- Author
-
Paula, Sthefane D'?vila de Oliveira e, Rodrigues, Maria de Lurdes de Azevedo, and Bessa, Elisabeth Cristina de Almeida
- Subjects
helminth fauna ,sistem?tica ,infracommunities ,morfologia ,sistematics ,Parasitologia ,morphology ,infracomunidades ,helmintofauna - Abstract
Made available in DSpace on 2016-04-28T20:16:22Z (GMT). No. of bitstreams: 1 2007 - Sthefane D'?vila de Oliveira e Paula.pdf: 3469002 bytes, checksum: 6411676587b6fa03e9508964399be8e0 (MD5) Previous issue date: 2007-02-15 Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq The aim of the present study was to obtain data on helminth fauna in Columba livia, in municipality of Juiz de Fora, Minas Gerais, Brasil; to describe the structure of the helminth infracommunities present in this host and to clarify questions concerning morphology, sistematics and ecology of some of the component species. The helminthological study of 35 hosts revealed the presence of two digenetic trematodes, Tanaisia (Paratanaisia) bragai (prevalence 51.42%, mean intensity 288.8 ? 403.86 and mean abundance 148 ? 320.9) and T. inopina (prevalence 2.85% and mean abundance 0.68 ? 4.05); five cestodes, Raillietina allomyodes (prevalence 34.28%, mean intensity 6.66 ? 9.14 and mean abundance 2.28 ? 6.11), Raillietina sp. (prevalence 37.14%, mean intensity 9 ? 10.68 and mean abundance 3.34 ? 7.7), Skrjabinia bonini (prevalence 20%, mean intensity 2.14 ? 1.21 and mean abundance 0.42 ? 1), Skrjabinia sp.( prevalence 5.7%, mean intensity 6 ? 7 and mean abundance 0.34 ? 7) and Fuhrmanneta sp. (prevalence 2.85% and mean abundance 0.028 ? 0.16) and four nematodes, Baruscapillaria obsignata (prevalence 51.42%, mean intensity 29.72 ? 44.2 and mean abundance 15.28 ? 34.7); Ascaridia columbae (prevalence 51.42%, mean intensity 60.55 ? 79.88 and mean abundance 31.14 ? 64.2); Tetrameres fissipina (prevalence 14.28%, mean intensity 346.3 ? 504.4 and mean abundance 49.42 ? 212.1) and Synhmanthus (Dyspharynx) nasuta (prevalence 2.85% and mean abundance 0.028 ? 0.16). Among the examined hosts, 97.2 % were found parasitized by at least one helminth species. In accordance with the prevalence of each species T. bragai, A. columbae and B. obsignata were considered secondary species and T. inopina, T. fissipina, S. nasuta, S. bonini, Skrjabinia sp., R. allomyodes, Raillietina sp. and Fuhrmanneta sp. were considered satellite species. All the species exhibited aggregate distributions, wich is the most common distribution pattern in helminth populations. Taxonomic and ecologic aspects of B. obsignata infrapopulations were analised and the results are discussed in terms of possible factors influencing the processes that lead to niche restriction and biased sex ratios in parasite infrapopulations. Additionaly, studies on morphology and sistematics of some component species were performed. Tanaisia (Paratanaisia) bragai and T. inopina specimens were analised by means of confocal laser scanning microscopy. Two new species of Raillietina and Skrjabinia were described and the sequences of the ITS2 ribossomal DNA of these species were determined and combined with other available Raillietina and Skrjabinia sequences in GenBank, in order to perform a phylogenetic study. O conhecimento da helmintofauna de Columba livia, no Brasil, teve in?cio com as investiga??es a respeito do parasitismo em animais dom?sticos. Esses he lmintos foram relativamente bem estudados, sob o aspecto faun?stico. No entanto, existem lacunas no conhecimento da morfologia, sistem?tica e ecologia das esp?cies. O conhecimento sobre a morfologia e, consequentemente, os caracteres utilizados na sistem?tica, se restringem quase totalmente `as informa??es que a microscopia de luz pode fornecer. N?o existem estudos sobre a ecologia das infracomunidades desses parasitos, no Brasil. Al?m disso, as rela??es entre algumas esp?cies ainda s?o incertas, sendo necess?ria a revis?o da posi??o taxon?mica e filogen?tica desses helmintos. O presente trabalho teve como objetivos gerais: 1- conhecer a helmintofauna de C. livia, no munic?pio de Juiz de Fora, Minas Gerais; 2- determinar a estrutura da comunidade desses helmintos; 3- elucidar quest?es relativas ? morfologia, sistem?tica e ecologia de algumas das esp?cies componentes dessa comunidade. Para este fim, foram necropsiadas 35 aves e os helmintos coletados foram processados segundo as t?cnicas helmintol?gicas conve ncionais e quantificados. Foram calculados o ?ndice de dispers?o, para determinar o padr?o de distribui??o das infrapopula??es; o ?ndice de concentra??o de domin?ncia de Simpson, para avaliar a presen?a de esp?cie dominante na estrutura da comunidade e o ?ndice de Brillouin (H), para determinar a diversidade parasit?ria da comunidade. O estudo helmintol?gico revelou a presen?a de duas esp?cies de digen?ticos, Tanaisia (Paratanaisia) bragai (preval?ncia 51.42%, intensidade m?dia 288.8 ? 403.86 e abund?ncia m?dia 148 ? 320.9) e T. inopina (preval?ncia 2.85% e abund?ncia m?dia 0.68 ? 4.05); cinco esp?cies de cest?ides, Raillietina allomyodes (preval?ncia 34.28%, intensidade m?dia 6.66 ? 9.14 e abund?ncia m?dia 2.28 ? 6.11), Raillietina sp. (preval?ncia 37.14%, intensidade m?dia 9 ? 10.68 e abund?ncia m?dia 3.34 ? 7.7), Skrjabinia bonini (preval?ncia 20%, intensidade m?dia 2.14? 1.21 e abund?ncia m?dia 0.42 ? 1), Skrjabinia sp. (preval?ncia 5.7%, intensidade m?dia 6 ? 7 e abund?ncia m?dia 0.34 ? 7) e Fuhrmanneta sp. (preval?ncia 2.85% e abund?ncia m?dia 0.028 ? 0.16) e quatro esp?cies de nemat?ides, Baruscapillaria obsignata (preval?ncia 51.42%, intensidade m?dia 29.72 ? 44.2 e abund?ncia m?dia 15.28 ? 34.7); Ascaridia columbae (preval?ncia 51.42%, intensidade m?dia 60.55 ? 79.88 e abund?ncia m?dia 31.14 ? 64.2); Tetrameres fissipina (preval?ncia 14.28%, intensidade m?dia 346.3 ? 504.4 e abund?ncia m?dia 49.42 ? 212.1) e Synhimanthus (Dyspharynx) nasuta (preval?ncia 2.85% e abund?ncia m?dia 0.028 ? 0.16). Aspectos da taxon?mia e ecologia das infrapopula??es de B. obsignata foram abordados e os resultados discutidos em termos dos poss?veis fatores com influ?ncia nos processos que levam `a restri??o de nicho e raz?es sexuais enviezadas. Adicionalmente, foram realizados estudos sobre a morfologia e sitem?tica de algumas das esp?cies componentes. Aspectos da morfologia de Tanaisia (Paratanaisia) bragai e T. inopina, foram elucidados utilizando-se como ferramenta a microscopia de varredura a laser confocal. Um estudo filogen?tico de esp?cies dos g?neros Raillietina e Skrjabinia, foi realizado atrav?s da an?lise de seq??ncias da regi?o espa?adora transcrita interna 2 (ITS2) do DNA ribossomal e duas esp?cies novas foram descritas.
- Published
- 2007
42. Estudo morfol?gico e biom?trico das larvas infectantes dos nemat?ides (Nematoda: Strongylidae) intestinais de equinos
- Author
-
Bevilaqua, Claudia Maria Leal and Rodrigues, Maria de Lurdes de Azevedo
- Subjects
Medicina Veterin?ria - Abstract
Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2020-10-26T13:59:00Z No. of bitstreams: 1 1988 - Claudia Maria Leal Bevilaqua.pdf: 844860 bytes, checksum: adac9f5f86bf81d4064bc0548b37e26a (MD5) Made available in DSpace on 2020-10-26T13:59:00Z (GMT). No. of bitstreams: 1 1988 - Claudia Maria Leal Bevilaqua.pdf: 844860 bytes, checksum: adac9f5f86bf81d4064bc0548b37e26a (MD5) Previous issue date: 1988-12-28 Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq Morphological and biometrical studies were carried out to improve the differential diagnostic of infective larvae of Strongylus vulgaris, Strongylus equinus, Strongylus edentatus, Triodontophorus spp., Triodontophorus tenuicollis, Poteriostomum spp., Gyalocephalus capitatus, Cylicocyclus radiatus, Cylicocyclus nassatus, Cylicocyclus ashworthi, Cylicostephanus minutus e Cylicostephanus poculatus. Pure cultures of larvae were obtained from eggs collected from adult female worms during necropsy of six naturally infected horses. Mixed cultures were obtained from feces of naturally infected horses from three counties of the State of Rio de Janeiro. The following measurements as total length, sheath tail length, esophageal and intestinal length, distance of genital primordium to the tip of the tail and width were considered as the main measurements in the identification of the third stage larvae. xix. A pictorial key for identifing infective larvae well as photomicrographies of the morphological characteristics were given in this work. Estudos morfol?gicos e biom?tricos foram realizados para aprimorar o diagn?stico diferencial das larvas infectantes de Strongylus vulgaris, Strongylus edentatus, Strongylus equinus, Triodontophorus spp., Triodontophorus tenuicollis, Gyalocephalus Capitatus, Poteriostomum spp., Cylicocyclus radiatus, Cylicocyclus nassatus, Cylicocyclus ashworthi, Cylicostephanus minutus e Cylicostephanus poculatus. Culturas puras foram realizadas a partir de ovos retirados do ?tero de f?meas de helmintos obtidos do intestino grosso de equinos por ocasi?o de seis necropsias. Culturas mistas foram efetuadas com fezes de equinos coletadas em tr?s munic?- pios do Estado do Rio de Janeiro. As seguintes caracter?sticas das larvas de terceiro est?dio foram medidas: comprimento total, comprimento da cauda da bainha, comprimento do es?fago, comprimento do intestino, dist?ncia do prim?rdio genital ? ponta da cauda da bainha e largura. xvii. Os dados obtidos foram comparados aos de outros autores. Chave para identifica??o das larvas infectantes ? apresentada. Fotomicrografias das principais caracter?sticas morfol?- gicas e an?lise estat?stica gr?fica s?o fornecidas.
- Published
- 1988
43. Cyathostomin larvae: presence on Brachiaria humidicola grass during the rainy and dry seasons of Brazil.
- Author
-
dos Santos CN, de Souza LS, Vieira VS, Pinheiro J, and Rodrigues Mde L
- Subjects
- Animals, Brazil, Larva, Rain, Seasons, Brachiaria parasitology, Strongyloidea physiology
- Abstract
The presence of cyathostomin larvae is directly associated to climatic conditions of each region. This study aimed to evaluate the ecology of infective larvae on Brachiaria humidicola during the dry and rainy seasons from October 2007 to September 2008 in a tropical region, Rio de Janeiro state, southeastern Brazil. Stools were collected from the rectum of horses naturally infected with cyathostomins at the beginning of the rainy season (October to March) and dry season (April to September). They were divided into four samples of 500 g and deposited on a grass patch of B. humidicola. Seven days later and every 15 days thereafter samples of feces and grass were collected and processed by the Baermann technique. The mean number of larvae recovered from the grass varied according to the season, with greater recovery of larvae during the peak of the dry season (14,700 L3.kg-¹ DM). There was a statistically significant difference between L3 recovered from feces and grass, but not between L3 recovered from the grass base and apex. These results show that the region's climate favors the development and survival of infective cyathostomin larvae throughout the year, with a greater number of larvae during the dry season.
- Published
- 2012
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.