23 results on '"Carvalho, Rogério Oliva"'
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2. Biological control of cyathostomin (Nematoda: Cyathostominae) with nematophagous fungus Monacrosporium thaumasium in tropical southeastern Brazil
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Tavela, Alexandre de Oliveira, Araújo, Jackson Victor, Braga, Fábio Ribeiro, Silva, André Ricardo, Carvalho, Rogério Oliva, Araujo, Juliana Milani, Ferreira, Sebastião Rodrigo, and Carvalho, Giovanni Ribeiro
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- 2011
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3. Ovicidal action of a crude enzymatic extract of the fungus Pochonia chlamydosporia against cyathostomin eggs
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Braga, Fabio Ribeiro, Araújo, Jackson Victor, Carvalho, Rogério Oliva, Silva, André Ricardo, Araujo, Juliana Milani, Soares, Filippe E. Feitas, Geniêr, Hugo L. André, Ferreira, Sebastião Rodrigo, and Queiroz, José Humberto
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- 2010
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4. Viability of the nematophagous fungus Pochonia chlamydosporia after passage through the gastrointestinal tract of horses
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Braga, Fabio Ribeiro, Araújo, Jackson Victor, Silva, André Ricardo, Carvalho, Rogério Oliva, Araujo, Juliana Milani, Ferreira, Sebastião Rodrigo, and Carvalho, Giovanni Ribeiro
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- 2010
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5. Activity of the nematophagous fungi Pochonia chlamydosporia, Duddingtonia flagrans and Monacrosporium thaumasium on egg capsules of Dipylidium caninum
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Araujo, Juliana Milani, Araújo, Jackson Victor de, Braga, Fabio Ribeiro, Carvalho, Rogério Oliva, and Ferreira, Sebastião Rodrigo
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- 2009
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6. Biological control of horse cyathostomin (Nematoda: Cyathostominae) using the nematophagous fungus Duddingtonia flagrans in tropical southeastern Brazil
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Braga, Fabio Ribeiro, Araújo, Jackson Victor, Silva, André Ricardo, Araujo, Juliana Milani, Carvalho, Rogério Oliva, Tavela, Alexandre Oliveira, Campos, Artur Kanadani, and Carvalho, Giovanni Ribeiro
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- 2009
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7. In vitro biological control of infective larvae of Ancylostoma ceylanicum
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Fernandes, Fernanda Mara, Araújo, Jackson Victor, Braga, Fabio Ribeiro, Gazzinelli-Guimarães, Pedro Henrique, Araujo, Juliana Milani, Ferreira, Sebastião Rodrigo, Carvalho, Rogério Oliva, Mello, Ingrid Ney Kramer de, and Fujiwara, Ricardo Toshio
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Duddingtonia flagrans ,biological control ,Nematophagous fungi ,Ancylostoma ceylanicum ,Fungos Nematófagos ,controle biológico - Abstract
The aim of this study was to evaluate the predatory activity of the fungus Duddingtonia flagrans (AC001) on infective larvae of Ancylostoma ceylanicum after gastrointestinal transit in hamsters. Twenty animals were used in the experiment, divided into two groups: a treated group (10 animals) and a control group (10 animals). In the group treated with D. flagrans, each animal received mycelium from the AC001 isolate, at an oral dose of 5 mg/25 g of live weight. To evaluate the predatory activity of the fungus, fecal samples were collected from the animals in both groups, at the times of 6, 8, 12, 24 and 36 hours after the treatment. Then, subsamples of 2 g of feces were placed in Petri dishes containing 2% water-agar (2% WA) culture medium and 1000 L3 of A. ceylanicum. Over the study period, the following percentage reductions were observed: 43.2% (6 hours), 30.8% (8 hours), 25.8% (12 hours), 30% (24 hours) and 11% (36 hours). The fungus D. flagrans presented predatory activity on the L3 of A. ceylanicum, after passing through the hamsters' gastrointestinal tract. It was therefore concluded that the fungus D. flagrans may be an alternative for biological control of the L3 of A. ceylanicum. O objetivo deste trabalho foi avaliar a atividade predatória do fungo Duddingtonia flagrans (AC001) sobre larvas infectantes de Ancylostoma ceylanicum após o trânsito gastrintestinal em hamsters. Foram utilizados vinte animais no experimento, divididos em dois grupos: um grupo tratado (10 animais) e um grupo controle (10 animais). No grupo tratado com D. flagrans, cada animal recebeu 5mg/25g de peso vivo de micélio do isolado AC001, por via oral. Para avaliar a atividade predatória do fungo, amostras fecais foram coletadas de ambos os grupos de animais nos horários de: 6, 8, 12, 24 e 36 após o tratamento. A seguir, 2g de fezes foram colocadas em placas de Petri contendo o meio de cultura ágar-água 2% (AA2%) e 1000 L3 de A. ceylanicum. Ao longo dos horários estudados os seguintes percentuais de redução foram observados: 43,2% (6 horas); 30,8% (8 horas); 25,8% (12 horas); 30% (24 horas) e 11% (36 horas). O fungo D. flagrans (AC001) apresentou atividade predatória sobre as L3 de A. ceylanicum após o trânsito pelo trato gastrintestinal de hamsters. Além disso, foi observada uma diferença significativa nos percentuais obtidos de cada horário em relação ao numero de L3 recuperadas (P < 0,01). Conclui-se, portanto, que o fungo D. flagrans pode ser uma alternativa de controle biológico das L3 de A. ceylanicum.
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- 2012
8. Destruição de larvas infectantes de Strongyloides venezuelensis pelos fungos Duddingtonia flagrans, Arthrobotrys robusta e Monacrosporium sinense
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Braga, Fabio Ribeiro, Araujo, Juliana Milani, Silva, André Ricardo e, Araújo, Jackson Victor de, Carvalho, Rogério Oliva, Tavela, Alexandre de Oliveira, Silva, Manoel Eduardo da, Fernandes, Fernanda Mara, and Melo, Alan Lane de
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Biological control ,Fungos nematófagos ,Controle biológico ,Nematophagous fungi ,Strongyloides venezuelensis - Abstract
INTRODUÇÃO: Strongyloides venezuelensis tem sido utilizado como um modelo para estudo da estrongiloidose humana. MÉTODOS: O objetivo deste trabalho foi comparar a capacidade predatória dos fungos nematófagos Duddingtonia flagrans (AC001), Arthrobotrys robusta (I-31) e Monacrosporium sinense (SF53) sobre larvas infectantes (L3) de Strongyloides venezuelensis em condições laboratoriais no meio ágar-água 2%. RESULTADOS: Ao final do experimento, os percentuais de redução de L3 de Strongyloides venezuelensis observados foram de: 93% (AC001); 77,2% (I-31) e 65,2% (SF53). CONCLUSÕES: Os fungos nematófagos foram capazes de capturar e destruir in vitro as L3, podendo ser utilizados como controladores biológicos de Strongyloides venezuelensis. INTRODUCTION: Strongyloides venezuelensis has been used as a model for studying human strongyloidosis. METHODS: This study aimed to compare the ability of predatory nematophagous fungi Duddingtonia flagrans (AC001), Arthrobotrys robusta (I-31) and Monacrosporium sinense (SF53) and on infective larvae (L3) of Strongyloides venezuelensis in laboratory conditions on 2% water-agar medium. RESULTS: At the end of the experiment, the percentage reductions of Strongyloides venezuelensi L3 were: 93% (AC001), 77.2% (I-31) and 65.2% (SF53). CONCLUSIONS: The nematophagous fungi were able to capture and destroy the L3 in vitro and can be used as biological controllers of Strongyloides venezuelensi.
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- 2011
9. Biological control of Ancylostoma spp. and of Toxocara canis by nematophagous fungi
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Carvalho, Rogério Oliva, Campos, Artur Kanadani, Benjamin, Laércio dos Anjos, Araújo, Jackson Victor de, Freitas, Leandro Grassi de, Guimarães, Marcos Pezzi, Lima, Walter dos Santos, and Nero, Luís Augusto
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Fungo ,Ancylostoma SPP ,Fungi ,CIENCIAS AGRARIAS::MEDICINA VETERINARIA::MEDICINA VETERINARIA PREVENTIVA [CNPQ] ,Toxocara Cati - Abstract
The interaction of man with dogs and cats is not limited to a situation of cohabitation family. These animals also frequent public areas and leisure for the human population and often defecate on these sites. Feces of infected animals, deposited in the environment may become contaminated soil with eggs and larvae of parasitic worms, which often are agents of zoonosis, especially Ancylostoma spp. and Toxocara sp. because they are zoonotic and are most prevalent in dogs.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. Among the biocontrol organisms, it is known that nematode- trapping fungi have been effective against nematodes of domestic animals. In order to determine the best fungus for control of Ancylostoma spp., the predatory capacity of nematophagous fungi Duddingtonia flagrans (AC001), Monacrosporium thaumasium (NF34a), M. appendiculatum (CGI), M. sinense (SF53), Arthrobotrys conoides (I-40), A. cladodes (CG719) and A. robusta (I-31) on infective Ancylostoma spp. larvae (L 3) was evaluated. Isolates AC001, I-31 and NF34a were more effective in capturing L3 during the in vitro assay. Isolates were then in vivo evaluated for the capacity to remain viable after passing through the gastrointestinal tract of dogs, while still maintaining their predatory activity against L3. Fungal isolates survived the passage and showed efficient predation 48 h after fungal administration to the dogs (P0.05), confirming the action of M. thaumasium against larvae in the soil, and can be therefore considered as an alternative environmental control of Ancylostoma spp. in dogs. In order to determine the best fungus for control of Toxocara canis, an assessment was made of the ovicidal activity of egg-parasitizing fungi Pochonia chlamydosporia (isolates VC1 and VC4) and Paecilomyces lilacinus on Toxocara canis eggs in vitro. All the fungal isolates showed ovicidal activity (type 3 effect) on T. canis eggs and can be considered a potential candidate to biological controller of those nematodes. O convívio do homem com cães e gatos não se limita a uma situação de cohabitação familiar. Estes animais freqüentam também áreas públicas de lazer destinadas à populacão humana e, com freqüência, defecam nestes locais. Fezes de animais parasitados, depositadas no ambiente podem tornar o solo contaminado com ovos e larvas de helmintos, os quais muitas vezes são agentes de várias zoonoses, com destaque para o Ancylostoma spp. e Toxocara sp. pelo potencial zoonótico e por serem os mais prevalentes. 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. Dentre os organismos biocontroladores, sabe-se que os fungos nematófagos têm tido eficácia contra os nematóides de animais domésticos. A fim de determinar o melhor fungo para o controle do Ancylostoma spp., sete isolados de fungos predadores de nematóides, Duddingtonia flagrans (AC001), Monacrosporium thaumasium (NF34a), M. appendiculatum (CGI), M. sinense (SF53), Arthrobotrys conoides (I-40), A. cladodes (CG719) e A. robusta (I-31) foram avaliados in vitro quanto à capacidade de predar larvas infectantes (L3) de Ancylostoma spp. Os isolados AC001, I-31 e NF34a mostraram mais eficazes na captura das L3 de Ancylostoma spp. no teste in vitro e em seguida foram avaliados in vivo quanto à capacidade de suportar a passagem pelo trato gastrintestinal de cães, sem perda da habilidade de predar L3 de Ancylostoma spp. Os isolados fúngicos sobreviveram à passagem e foram eficientes em predar as L 3 nas primeiras 48h de coleta das fezes (P0,05), comprovando a ação do fungo M. thaumasium sobre as larvas do solo, podendo servir como uma alternativa de controle ambiental do Ancylostoma spp. de cães. Para determinar o melhor fungo no controle do Toxocara canis, foi avaliada a atividade ovicida, in vitro, dos fungos oportunistas Pochonia chlamydosporia (isolados VC1 e VC4) e Paecilomyces lilacinus sobre ovos de Toxocara canis. Todos os isolados fungicos apresentaram atividade ovicida (efeito tipo 3) sobre ovos de T. canis e são promissores candidatos a controladores biológicos deste helminto.
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- 2010
10. Eficácia do fembendazol e do pamoato de pirantel sobre nematóides intestinais de cães
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Carvalho, Rogério Oliva and Araújo, Jacson Victor de
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Cão ,Pamoato de pirantel ,Toxocara canis ,Fembendazol ,Ancylostoma sp - Abstract
Avaliou-se a eficácia do fembendazol e do pamoato de pirantel no controle de nematóides intestinais de cães. Foram utilizados 36 filhotes, naturalmente infectados por Ancylostoma sp. e Toxocara canis, selecionados por meio de exames coprológicos de Willis, sedimentação simples e contagem de ovos por grama de fezes (OPG). Os animais foram distribuídos em três grupos de 12 cães cada, sendo um controle (sem tratamento), um tratado com fembendazol (100 mg/kg) e o outro com pamoato de pirantel (15 mg/kg). Os exames coprológicos foram realizados nos dias zero, um, três, cinco e sete pós-tratamento. No sétimo dia, os animais foram sacrificados e necropsiados para coleta dos vermes adultos. A eficácia do pamoato de pirantel contra o A. caninum foi de 99,9%, com redução de 100% do OPG no sétimo dia pós-tratamento. Contra o T. canis foi de 71,6%, com redução de 80,7% do OPG. A eficácia do fembendazol contra o A. caninum foi 93,2%, com redução de 96,2% do OPG e 82,1% contra o T. canis, com redução de 95,7% do OPG. As duas drogas mostraram-se eficaz para o controle do A. caninum e pouco eficazes para o controle do T. canis. The efficiency of fenbendazol and pyrantel pamoate was evaluated against intestinal nematodes of dogs. Thirty three puppies naturally infected by Ancylostoma sp. and Toxocara canis were selected through fecal tests by Willis method, simple sedimentation and count of eggs per gram of feces (EPG). The animals were separated into three groups of 12 dogs each: a control (without treatment), a group treated with fenbendazole (100 mg/kg) and the other with pyrantel pamoate (15 mg/kg). Fecal tests were performed at days 0, 1, 3, 5 and 7 after treatments. On the seventh day, the animals were euthanized and necropsied for collection of adult worms. Efficiency of pyrantel pamoate against A. caninum was 99.9% with reduction of 100% of EPG on the seventh day after the treatment. The efficiency against T. canis was 71.6%, with reduction of 80.7% of EPG. Efficiency of fenbendazole against A. caninum was 93.2%, with reduction of 96.2% of OPG and 82.1% against T. canis, with reduction of 95.7% of OPG. The two drugs showed efficiency for the control of A. caninum and lower efficiency for the control of T. canis.
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- 2009
11. Efficacy of fenbendazole and of pyrantel pamoato on Ancylostoma sp. e Toxocara canis, parasites intestinal of dogs
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Carvalho, Rogério Oliva, Araújo, Jackson Victor de, Salcedo, Joaquín Hernán Patarroyo, Pompermayer, Luiz Gonzaga, Guimarães, Marcos Pezzi, and Viana, José Antonio
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Intestines ,Cão ,Doenças ,Intestino ,Dog ,Diseases ,CIENCIAS BIOLOGICAS::PARASITOLOGIA [CNPQ] - Abstract
The objective of this work was to evaluate the individual efficacy of the fenbendazole and the pyrantel pamoate against intestinal nematodes of dogs. Thirty six nestlings of dogs were used, being eighteen males and eighteen females up to six months of age, coming of the kennel of the Department of Veterinary Medicine of the Federal University of Viçosa, selected through fecal exams of Willis, simple sedimentation and count of eggs per gram of feces (EPG). being used the animals that presented mixed infection for Ancylostoma sp. and Toxocara canis. The animais were distributed in three groups of twelve animals, being a control group, a group treated with fenbendazole, 100 mg for Kg of body weight, orally, in an unique dose, and the other with pyrantel pamoate, 5 mg for Kg of body weight, orally, in an unique dose. During the whole experimental period, the dogs received commercial ration and water ad libitum . Fecal exams of Willis, simple sedimentation and EPG realized in the day of the treatment (0), 24 hours after the treatments (1) and in the 3, 5 and 7 after the treatments. In the seventh day, the animals were killed and necropsied for collection of the adult worms and the mucosa of the gastrointestinal tract was submitted to digestion process, in hydrochloric acid to 3%, for research of immature stages. The results showed an efficacy of 99,89% of the pyrantel pamoate against the A. caninum with reduction of 100% of EPG in the seventh day after the treatment, and against the T. canis the effectiveness was of 71,65%, with reduction of 80,73% of OPG. The fenbendazole showed an efficacy of 93,19% against the A. caninum, with reduction of 96,22% in the EPG and an efficacy of 82,1% against the T. canis, reducing the EPG in 95,71%. The results demonstrate the efficacy for the control of the A. caninum with the two drugs, with higher effective of the pyrantel pamoate. To the T. canis control the drugs shower lower efficacy when administered separately in the doses recommended commercially. Este trabalho teve como objetivo avaliar a eficácia individual do fembendazol e do pamoato de pirantel contra nematóides intestinais de cães. Para tal, foram utilizados 36 filhotes de cães, sendo 18 machos e 18 fêmeas com menos de seis meses de idade , provenientes do canil do Departamento de Veterinária da Universidade Federal de Viçosa, selecionados por meio de exames coprológicos de Willis, sedimentação simples e contagem de ovos por grama de fezes (OPG). Foram utilizados os animais que apresentaram infecção mista por Ancylostoma sp. e Toxocara canis. Estes foram distribuídos em três grupos de doze animais, sendo um grupo controle, um tratado com fembendazol, 100 mg por Kg de peso vivo, por via oral, em dose única, e o outro com pamoato de pirantel, 15mg por Kg de peso vivo, por via oral, em dose única. Durante todo o período experimental, os cães receberam ração comercial e água à vontade. Foram realizados exames coprológicos de Willis, sedimentação simples e contagem de ovos por grama de fezes (OPG), no dia do tratamento (dia 0), 24 horas após os tratamentos (dia 1) e nos dias 3, 5 e 7 pós-tratamento. No sétimo dia, os animais foram sacrificados e necropsiados para coleta dos vermes adultos e as mucosas do trato gastrintestinal passaram por um processo de digestão, em acido clorídrico a 3%, para pesquisa de estádios imaturos. Os resultados obtidos mostraram que houve uma eficácia de 99,89% do pamoato de pirantel contra o A. caninum e uma redução de 100% do OPG no sétimo dia após o tratamento, já contra o T. canis a eficácia foi de 71,63%, com redução de 80,73% do OPG. O fembendazol apresentou uma eficácia de 93,19% contra o A. caninum, com redução de 96,22% do OPG e uma eficácia de 82,1% contra o T. canis, reduzindo o OPG em 95,71%. Para o controle do A. caninum, as duas drogas se mostraram eficazes, com maior eficácia do pamoato de pirantel, mas, para o T. canis as drogas foram pouco eficazes quando administrados isoladamente nas doses comercialmente recomendadas.
- Published
- 2004
12. In vitro biological control of infective larvae of Ancylostoma ceylanicum
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Fernandes, Fernanda Mara, primary, Araújo, Jackson Victor, additional, Braga, Fabio Ribeiro, additional, Gazzinelli-Guimarães, Pedro Henrique, additional, Araujo, Juliana Milani, additional, Ferreira, Sebastião Rodrigo, additional, Carvalho, Rogério Oliva, additional, Mello, Ingrid Ney Kramer de, additional, and Fujiwara, Ricardo Toshio, additional
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- 2012
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13. Destruição de larvas infectantes de Strongyloides venezuelensis pelos fungos Duddingtonia flagrans, Arthrobotrys robusta e Monacrosporium sinense
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Braga, Fabio Ribeiro, primary, Araujo, Juliana Milani, additional, Silva, André Ricardo e, additional, Araújo, Jackson Victor de, additional, Carvalho, Rogério Oliva, additional, Tavela, Alexandre de Oliveira, additional, Silva, Manoel Eduardo da, additional, Fernandes, Fernanda Mara, additional, and Melo, Alan Lane de, additional
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- 2011
- Full Text
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14. Ação ovicida do extrato bruto enzimático do fungo Pochonia chlamydosporia sobre ovos de Ancylostoma sp
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Braga, Fabio Ribeiro, primary, Araujo, Juliana Milani, additional, Silva, André Ricardo e, additional, Araújo, Jackson Victor de, additional, Carvalho, Rogério Oliva, additional, Soares, Filippe Elias de Freitas, additional, Queiroz, José Humberto de, additional, and Gênier, Hugo Leonardo André, additional
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- 2011
- Full Text
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15. Atividade predatória dos fungos nematófagos Duddingtonia flagrans, Monacrosporium thaumasium e Artrobotrys robusta sobre larvas infectantes de Strongyloides stercoralis
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Braga, Fabio Ribeiro, primary, Silva, André Ricardo e, additional, Araújo, Juliana Milani, additional, Carvalho, Rogério Oliva, additional, Araújo, Jackson Victor de, additional, and Frassy, Luiza Neme, additional
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- 2010
- Full Text
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16. Efeito do fungo Paecilomyces lilacinus sobre ovos de Taenia saginata
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Braga, Fabio Ribeiro, primary, Araújo, Jackson Victor de, additional, Araujo, Juliana Milani, additional, Carvalho, Rogério Oliva, additional, and Silva, André Ricardo, additional
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- 2008
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17. Pochonia chlamydosporia in the biological control of Fasciola hepatica and comparison of techniques of eggs sedimentation
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Dias, Anderson Silva, Braga, Fábio Ribeiro, Araújo, Jackson Victor de, Carvalho, Rogério Oliva, Araujo, Juliana Milani, Zanuncio, José Cola, and Silva, Ita de Oliveira e
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Bovino - Doenças ,Pochonia chlamydosporia ,Biological control ,CIENCIAS AGRARIAS::MEDICINA VETERINARIA::MEDICINA VETERINARIA PREVENTIVA::DOENCAS PARASITARIAS DE ANIMAIS [CNPQ] ,Controle biológico ,Fasciola hepatica ,Cattle - Diseases - Abstract
Fundação de Amparo a Pesquisa do Estado de Minas Gerais The presence of helminths causing losses in livestock in the Brazil and in the world is significant. The Fasciola hepatica is among the main agents responsible for these losses. Due to increased occurrences of problems anthelmintic resistance and failures in the control of this helminths, the use of agent of biological control have been studied and they have showed promising results. This study aims to evaluate: the action of the fungus Pochonia chlamydosporia in vitro and in vivo on eggs of F. hepatica, after passage through of gastrointestinal tract of cattle in formulations of pellets; assess the weather conditions on F. hepatica egg production and evaluate three techniques of sedimentation to quantify F. hepatica eggs in cattle faeces. Thus, stool samples were collected in cattle of treated group with pellets contained the fungus P. chlamydosporia and control group with pellets without fungus in times 12, 18, 24, 48, 72 and 96 h after administration of pellets. The ovicidal effect was observed after seven days of interaction. The fungus showed ovicidal activities on eggs F. hepatica in the samples (treated group) in all times from 12 h. Significant differences (p 0.05) and, thus, it is possible that the animals can be infected by F. hepatica during all the year. The modified sedimentation techniques of Dennis, Stone & Swanson (DSS), Girão and Ueno (quatro tamises) and Foreyt were compared. The modified DSS technique was the most sensitivity (p0,05) e, dessa forma, é possível que os animais possam ser infectados por F. hepatica durante todo o ano. As técnicas de sedimentação modificadas de Dennis, Stone & Swanson (DSS), Girão e Ueno (quatro tamises) e Foreyt foram comparadas. A técnica de DSS modificada foi a mais sensível (p
- Published
- 2014
18. Evaluation of the association in vitro and in vivo of nematophagous fungi Duddingtonia flagrans, Monacrosporium thaumasium and Pochonia chlamydosporia to control infective larvae of Cyathostomin and Trichostrongykids
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Tavela, Alexandre de Oliveira, Braga, Fábio Ribeiro, Benjamin, Laércio dos Anjos, Araújo, Jackson Victor de, Silva, Ita de Oliveira e, Lima, Walter dos Santos, and Carvalho, Rogério Oliva
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Nematóides ,Monacrosporium thaumasium ,Nematodes ,CIENCIAS AGRARIAS::MEDICINA VETERINARIA [CNPQ] ,Fungos nematófagos ,Nematophagous fungi - Abstract
Conselho Nacional de Desenvolvimento Científico e Tecnológico The control of nematode infections in horses and goats has been based on the use of anthelminthic drugs. However, the parasitic resistance is now a serious problem installed around the world. On the other hand, the biological control with nematophagous fungi has been studied as an alternative method in combating nematodes of domestic animals, although formulations containing combinations of two or more different genera of fungi are unexplored. Thiswork aimed to evaluate the association in vitro and in vivo of nematophagous fungi Duddingtonia flagrans, Monacrosporium thaumasium and Pochonia chlamydosporia to control nematodiosis of horses and goats. This work was divided into three experimental essays (A, B and C), performed in separate steps. In the essay Awas tested the action of three nematophagous fungi associated in laboratorial conditions using Petri dishes containing Duddingtonia flagrans (AC001), Monacrosporium thaumasium (NF34) and Pochonia chlamydosporia (VC1)fungi to control cyathostomin. In the essay B was evaluated in vivothe association of sodium alginate pellets containing fungi D. flagrans and M. thaumasium to control equine cyathostomin. In the essay C was evaluated the association of fungi D. flagrans and M. thaumasium on trichostrongylides infective larvae under laboratory conditions and after passage through the gastrointestinal tract of goats. The use of the fungi D. flagrans, M. thaumasium and P. chlamydosporia associated to control cyathostomin and trichostrongylidesin vitro and in vivo showed promising results. However, more tests should be performed in the field, in order to observe the effectiveness of the association of these fungi on environmental control of nematodes in horses and goats. O controle das verminoses de equinos e caprinos tem sido baseado na utilização de drogas antihelmínticas. No entanto, atualmente a resistência parasitária é um sério problema instalado em todo o mundo. Por outro lado, o controle biológico com fungos nematófagos tem sido estudado no combate alternativo de nematoides de animais domésticos, embora formulações contendo associações de dois ou mais gêneros diferentes de fungos ainda seja pouco explorada.O objetivo do presente trabalho foi avaliar a associação in vitro e in vivo dos fungos nematófagos Duddingtonia flagrans, Monacrosporium thaumasium e Pochonia chlamydosporia no controle das nematodioses de equinos e caprinos. O trabalho foi dividido em três ensaios experimentais denominados A, B e C, realizados em etapas distintas. No ensaio A foi testada a ação de três fungos nematófagos associados em condições laboratoriais utilizando placas de Petri contendo os fungos Duddingtonia flagrans (AC001), Monacrosporium thaumasium (NF34) e Pochonia chlamydosporia (VC1) no controle de ciatostomíneos parasitos de equinos. No ensaio B foi avaliada a associacão in vivo de péletes de alginato de sódio contendo os fungos D. flagrans e M. thaumasium no controle de ciatostomíneos. No ensaio C, foi avaliada a associação dos fungos D. flagrans e M. thaumasium sobre larvas infectantes de tricostrongilídeos em condições laboratoriais e após a passagem pelo tubo digestivo de caprinos. A utilização dos fungos D. flagans,M. thaumasium e P. chlamydosporia associados no controle de ciatostomíneose trichostrongilídeosin vitro e in vivo apresentou resultados promissores. Contudo, devem ser realizados mais testes a campo, com a finalidade de observar a eficiência da associação desses fungos no controle ambiental de nematóides de equinos e caprinos.
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- 2013
19. Association of Nematophagous fungi of Duddingtonia, Monacrosporium and Arthrobotrys genus in the biological control of gastrointestinal nematodes of small ruminants
- Author
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Silveira, Wendeo Ferreira da, Braga, Fábio Ribeiro, Araújo, Jackson Victor de, Oliveira, Leandro Licursi de, and Carvalho, Rogério Oliva
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Sheep ,Biological control ,CIENCIAS AGRARIAS::MEDICINA VETERINARIA [CNPQ] ,Fungos nematófagos ,Controle biológico ,Nematophagous fungi ,Ovinos - Abstract
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior The gastrointestinal nematodes caused mainly by the genus: Trichostrongylus spp., Cooperia spp., Oesophagostomum spp, Strongyloides spp and Haemonchus spp. are a deadlock to raise small ruminants (caprine and ovine). The control of these parasites has been done by anti-helminthic drugs, however there are many reports about the occurrence of resistance. In this context, the use of nematophagous fungi, come as a viable alternative in the fight against gastrointestinal nematodes. The isolated of nematophagous fungi of the genus Duddigtonia flagrans (AC001), Monacrosporium thaumasium (NF34), Arthrobotrys robusta (I31) and A. conoides (I40) were used in an associated form (AC001+I31) and (NF34+I40) aiming to evaluate in vitro the viability of association of nematophagous fungi after passing through the gastrointestinal tract of goats. In order to do so, it was used association of nematophagous fungi above the concentration of 1x106 conidium and chlamidospore / kg of live weight (LW), given in a single dose. And after, evaluate the viability of the associations of fungi isolated (AC001 + I31) and (NF34 + I40) in pellet matrix of sodium alginate in the biological control of nematodes of sheeps under field conditions. Therefore, were evaluated number of infective larvae recovered in distances 0-20 cm and 20-40 cm from the fecal matter, Egg counts per gram of faeces (EPG), in groups treated and control, prevalence of genus strongyilis recovered in fecal cultures, hematocrit and total protein count in the blood. Fungi structures associated were capable of passing through the gastrointestinal tract of goats and reduce the number of infected larvae (L3) of gastrointestinal nematodes in vitro. For the association among the isolates AC001 and I31, there were differences between the treated group and the control of the interval of 12h (P< 0,01) and 48h (P< 0,05), L3 percentage of reduction in gastrointestinal nematodes of 53% and 68% respectively. On the other hand, the association of the isolates NF34 and I40), differences (P < 0,01) were observed in the interval of 24, 48 and 72 hours, with percentage reduction of larvae of 56%, 61% and 48% respectively. The association among the isolated AC001 and I31 in matrix of sodium alginate was X not able to reduce the counting of eggs by grams of feces (EPG) of sheeps under fields conditions. On the other hand, the association among the isolates NF34 and I40 in the same conditions showed a difference (P< 0,01) in EPG compared to the control group. There was a difference (P< 0,05) between the number of L3 recovered in the distance of 0-20 cm from fecal pats, with a higher predominance of the genus Haemonchus ssp., Cooperia spp., Trichostrongylus spp.and Oesophagostomum spp. The results showed that the associations of the isolated of nematophagous fungi AC001+I31 and NF34+I40 can be used as a way of biological control of gastrointestinal nematodes of small ruminants at lab conditions as well as field conditions. As nematodioses gastrintestinais causadas principalmente pelos gêneros: Trichostrongylus spp., Cooperia spp., Oesophagostomum spp, Strongyloides spp e Haemonchus spp. são um entrave para a criação de pequenos ruminantes (caprinos e ovinos). O controle destes parasitos tem sido realizado com drogas antihelmínticas, porém há muitos relatos do aparecimento de resistência. Nesse contexto, a utilização de fungos nematófagos, surge como uma alternativa viável no combate aos nematoides gastrointestinais. Os isolados de fungos nematófagos Duddigtonia flagrans (AC001), Monacrosporium thaumasium (NF34), Arthrobotrys robusta (I31) e A. conoides (I40) foram utilizados de forma associada (AC001+I31) e (NF34+I40) com o objetivo de avaliar in vitro a viabilidade da associação de fungos nematófagos após a passagem pelo trato gastrintestinal de caprinos. Para tal, foram utilizadas associações de fungos nematófagos acima na concentração de 1x106 conídios e clamidósporos/ kg de peso vivo (PV), administrado em dose única por via oral. Posteriormente foi avaliada a viabilidade das associações dos isolados fúngicos (AC001 + I31) e (NF34 + I40) em péletes de matriz de alginato de sódio no controle biológico de nematoides de ovinos criados a campo. Neste sentido, foram avaliados o número de larvas infectantes de nematoides gastrintestinais recuperadas nas pastagens nas distancias de 0 a 20 cm do bolo fecal e de 20 a 40 cm do bolo fecal, contagem do número de ovos por grama de fezes (OPG) nos grupos tratados e controle, prevalência dos gêneros de estrongilideos recuperados nas coproculturas, hematócrito e contagem de proteínas totais no sangue. Estruturas fúngicas associadas foram capazes de passar pelo trato gastrintestinal de caprinos e reduzir o número de Larvas infectantes (L3) de nematoides gastrintestinais in vitro. Para a associação entre os isolados AC001 e I31, houve diferenças entre o grupo tratado e controle nos horários de 12h (P< 0,01) e 48h (P< 0,05), com percentagem de redução L3 nematoides gastrintestinais de 53% e 68% respectivamente. Já para a associação entre os isolados NF34 e I40, diferenças (P< 0,01) foram observadas nos tempos de 24, 48 e 72 horas, com percentagem de redução de larvas de 56%, VIII 61% e 48% respectivamente. A associação entre os isolados AC001 e I31 em matriz de alginato de sódio não foi capaz de reduzir a contagem de ovos por grama de fezes (OPG) de ovinos criados a campo. Por outro lado, a associação entre os isolados NF34 e I40 nas mesmas condições demonstrou diferença (P< 0,01) no OPG em relação ao grupo controle. Houve diferença (P< 0,05) entre o número de L3 recuperadas na distância de 0-20 cm do bolo fecal, com maior prevalência dos gêneros Haemonchus ssp., Cooperia spp., Trichostrongylus spp.e Oesophagostomum spp. Os resultados demonstraram que as associações dos isolados de fungos nematófagos AC001+I31 e NF34+I40 podem ser utilizadas como forma de controle biológico de nematoides gastrintestinais de pequenos ruminantes tanto em condições laboratoriais quanto a campo.
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- 2013
20. [Destruction of Strongyloides venezuelensis infective larvae by fungi Duddingtonia flagrans, Arthrobotrys robusta and Monacrosporium sinense].
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Braga FR, Araujo JM, Silva AR, Araújo JV, Carvalho RO, Tavela Ade O, Silva ME, Fernandes FM, and Melo AL
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- Animals, Ascomycota classification, Larva microbiology, Ascomycota physiology, Pest Control, Biological methods, Strongyloides microbiology
- Abstract
Introduction: Strongyloides venezuelensis has been used as a model for studying human strongyloidosis., Methods: This study aimed to compare the ability of predatory nematophagous fungi Duddingtonia flagrans (AC001), Arthrobotrys robusta (I-31) and Monacrosporium sinense (SF53) and on infective larvae (L3) of Strongyloides venezuelensis in laboratory conditions on 2% water-agar medium., Results: At the end of the experiment, the percentage reductions of Strongyloides venezuelensi L3 were: 93% (AC001), 77.2% (I-31) and 65.2% (SF53)., Conclusions: The nematophagous fungi were able to capture and destroy the L3 in vitro and can be used as biological controllers of Strongyloides venezuelensi.
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- 2011
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21. [Ovicidal action of a crude enzymatic extract of fungus Pochonia chlamydosporia against Ancylostoma sp eggs].
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Braga FR, Araujo JM, Silva AR, Araújo JV, Carvalho RO, Soares FE, Queiroz JH, and Gênier HL
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- Animals, Complex Mixtures isolation & purification, Ovum drug effects, Pest Control, Biological methods, Ancylostoma drug effects, Complex Mixtures pharmacology, Hypocreales enzymology
- Abstract
Introduction: Ancylostoma sp is a potentially zoonotic geohelminth., Methods: This study aimed to evaluate in vitro the action of crude enzyme extract of Pochonia chlamydosporia (VC4) on eggs of Ancylostoma sp in 2% water-agar and in fecal cultures., Results: The percentage reduction in Ancylostoma sp egg eclosion was 76.8% in Petri dishes of the treated group compared to the control group., Conclusions: The crude enzyme extract of Pochonia chlamydosporia was effective at reducing Ancylostoma sp egg eclosion and can be used as biological control of this nematode.
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- 2011
- Full Text
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22. [Predatory activity of the nematophagous fungi Duddingtonia flagrans, Monacrosporium thaumasium and Arthrobotrys robusta on Strongyloides stercoralis infective larvae].
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Braga FR, Silva AR, Araújo JM, Carvalho RO, Araújo JV, and Frassy LN
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- Animals, Ascomycota classification, Dogs, Larva microbiology, Mitosporic Fungi classification, Strongyloides stercoralis growth & development, Ascomycota physiology, Mitosporic Fungi physiology, Pest Control, Biological methods, Strongyloides stercoralis microbiology
- Abstract
Introduction: Strongyloides stercoralis is a nematode that infects much of the population worldwide., Methods: This study aimed to compare the ability of predatory nematophagous fungi Duddingtonia flagrans (AC001), Monacrosporium thaumasium (NF34) and Arthrobotrys robusta (I-31) on infective larvae (L₃) of Strongyloides stercoralis in laboratory conditions on 2% water-agar., Results: At the end of the experiment, the percentage reductions in Strongyloides stercoralis L3 were 83.7% (AC001), 75.5% (NF34) and 73.2% (I-31)., Conclusions: The nematophagous fungi were able to capture and destroy the L3 in vitro and may be used as biological controls of Strongyloides stercoralis.
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- 2010
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23. [Effect of the fungus Paecilomyces lilacinus on Taenia saginata eggs].
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Braga FR, Araújo JV, Araujo JM, Carvalho RO, and Silva AR
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- Animals, Time Factors, Ovum microbiology, Paecilomyces physiology, Pest Control, Biological methods, Taenia saginata microbiology
- Abstract
With the aim of demonstrating the effectiveness of the fungus Paecilomyces lilacinus on Taenia saginata eggs under laboratory conditions, a trial was set up in Petri dishes with water-agar 2%. There was ovicidal activity (p < 0.05) in relation to the control group on the tenth day of interaction and an internal colonization rate of 25.5% in the eggs.
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- 2008
- Full Text
- View/download PDF
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