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12. Ovine gammaherpesvirus 2 infections in cattle without typical manifestations of sheep-associated malignant catarrhal fever and concomitantly infected with bovine coronavirus

Author

Headley, Selwyn Arlington, de Lemos, Gisele Augusta Amorim, Dall Agnol, Alais Maria, Xavier, Ana Aparecida Correa, Depes, Victória Coronado Antunes, Yasumitsu, Carolina Yuka, Oliveira, Thalita Ernani Silva, Silva, Luara Evangelista, Faccin, Tatiane Cargnin, Alfieri, Amauri Alcindo, and Lisboa, Júlio Augusto Naylor

Published
2022
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13. Ovine gammaherpesvirus-2 infection associated with chronic interstitial pneumonia in a sheep

Author

Headley, Selwyn Arlington, Agnol, Alais Maria Dall, Navolar, Felipe Martins Negreiros, Frucchi, Ana Paula Souza, de Matos, Andressa Maria Rorato Nascimento, Pereira, Priscilla Fajardo Valente, Xavier, Ana Aparecida Correa, dos Santos, Vitor Hugo, Silva, Luara Evangelista, Depes, Victoria Coronado Antunes, Alfieri, Alice Fernandes, Cunha, Cristina Wetzel, and Alfieri, Amauri Alcindo

Published
2021
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15. Transplacental Infections Associated with Macavirus in Aborted Bovine Fetuses.

Author

Silva, Flávia Helena Pereira, Fritzen, Juliana Torres Tomazi, Figueiredo, Julia Raisa Ximenes, Jurkevicz, Rafaela Maria Boson, Domingues, Ana Flávia Ferrreira, Rose, Milena Patzer, Silva, Luara Evangelista, Garcia, João Luis, Alfieri, Amauri Alcindo, and Headley, Selwyn Arlington

Subjects
BOVINE viral diarrhea virus, ANIMAL herds, DIAGNOSTIC immunohistochemistry, NEOSPORA caninum, DNA polymerases
Abstract

The Macavirus genus, Gammaherpesvirinae subfamily, Herpesviridae family, contains ovine gammaherpesvirus 2 (OvGHV2), the cause of sheep-associated malignant catarrhal fever (SA-MCF). Members of the Macavirus genus associated with the development of malignant catarrhal fever (MCF) in their respective hosts share the 15A antigenic epitope, are conserved within the DNA polymerase gene and are collectively referred to as the malignant catarrhal fever virus (MCFV) complex. The ability of MCFV and/or OvGHV2 to produce abortions in ruminants is currently unknown, with little documentation of infections by these agents in bovine fetuses. This report presents the findings observed due to the detection of OvGHV2 DNA and MCFV tissue antigens in aborted bovine fetuses from southern Brazil. Four aborted bovine fetuses from three farms, located in a geographical region of Paraná State with elevated immunohistochemical (IHC) prevalence of MCFV tissue antigens, with gestational ages varying between 78 to 208 days were investigated. Significant gross and histopathological alterations were not observed in any of these fetuses. An IHC assay using the 15A-monoclonal antibody (15A-MAb), which is based on the 15A antigenic epitope of Macavirus, identified MCFV tissue antigens in multiple organs from two fetuses (#1 and #4); however, positive immunoreactivity to the 15A-MAb IHC assay was not detected in Fetus #2 and #3. Molecular testing amplified OvGHV2 DNA only from the myocardium and lungs of Fetus #1 that had positive intracytoplasmic immunoreactivity to the 15A-MAb IHC assay in these tissues. Furthermore, infections by Leptospira spp. were confirmed by molecular assays in fetuses #1, #3, and #4, while PCR detected Neospora caninum in the myocardium of Fetus #2. Additionally, molecular assays to identify well-known fetopathy agents of cattle, including bovine viral diarrhea virus, bovine alphaherpesvirus 1, Histophilus somni, and Listeria monocytogenes, did not amplify the nucleic acids of these pathogens. PCR assays to identify bovine gammaherpesvirus 6 (BoGHV6), another Macavirus known to infect cattle in Brazil, were unsuccessful. These findings confirmed that the 15A-MAb IHC assay can be efficiently used to detect MCFV antigens in organs of aborted bovine fetuses. The identification of MCFV antigens with the simultaneous detection of OvGHV2 DNA confirmed that Fetus #1 was infected by OvGHV2 and added to the few descriptions of this infection in aborted fetuses of ruminants worldwide. Moreover, the IHC detection of MCFV in multiple organs of Fetus #4, without the molecular detection of OvGHV2 or BoGHV6, may suggest that this fetus was infected by a Macavirus that was not previously diagnosed in cattle herds from Brazil. These findings strongly suggest that OvGHV2 and MCFV can produce transplacental infections in cattle. [ABSTRACT FROM AUTHOR]

Published
2024
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17. Isolation, genetic and immunohistochemical identification of Toxoplasma gondii from human placenta in a large toxoplasmosis outbreak in southern Brazil, 2018

Author

Pinto-Ferreira, Fernanda, Nino, Beatriz de Souza Lima, Martins, Felippe Danyel Cardoso, Monica, Thais Cabral, Britto, Isadora Cortella, Signori, Ariana, Medici, Kerlei Cristina, Freire, Roberta Lemos, Navarro, Italmar Teodorico, Garcia, João Luis, Headley, Selwyn Arlington, Vogel, Fernanda Silveira Flores, Minuzzi, Camila E., Portella, Luiza Pires, Bräunig, Patricia, Sangioni, Luis Antonio, Ludwig, Aline, Ramos, Luciane Silva, Pacheco, Liliane, Silva, Camila Ribeiro, Pacheco, Flávia Caselli, Menegolla, Ivone Andreatta, Farinha, Lourdes Bonfleur, Haas, Simone, Canal, Natalia, Mineo, José Roberto, Difante, Cledison Marcio, and Mitsuka-Breganó, Regina

Published
2020
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21. Subclinical Ovine Gammaherpesvirus 2-Related Infections in Free-Ranging Wild Boars (Sus scrofa) from Southern Brazil.

Author

Headley, Selwyn Arlington, Fritzen, Juliana Torres Tomazi, Silva, Flavia Helena Pereira, Minarelli, Silvio Luis Marsiglio, Biondo, Leandro Meneguelli, Kmetiuk, Louise Bach, Biondo, Alexander Welker, and Alfieri, Amauri Alcindo

Subjects
WILD boar, ANIMAL populations, ANIMAL diseases, ORGANS (Anatomy), LUNG diseases, EPITHELIAL cells
Abstract

Ovine gammaherpesvirus 2 (OvGHV2), is a Macavirus and the cause of sheep-associated malignant catarrhal fever (SA-MCF), in which sheep are the asymptomatic reservoir hosts. Susceptible mammalian populations infected by OvGHV2 may develop clinical SA-MCF or subclinical infections. All members of the Macavirus genus known to be associated with MCF are collectively referred to as the MCF virus (MCFV) complex. This report describes the occurrence of subclinical OvGHV2-related infections in free-ranging wild boars (Sus scrofa) from southern Brazil. Specific body organs (n = 14) and biological samples (nasal and oral swabs; n = 17) were collected from 24 asymptomatic wild boars from a conservation unit located within the Central-eastern mesoregion of Paraná State. Organs were processed to observe histopathological patterns suggestive of diseases of domestic animals; only pulmonary samples were used in an immunohistochemical assay designed to detect MCFV tissue antigens. Furthermore, all samples were submitted to molecular assays designed to detect the OvGHV2 tegument protein gene. Viral-induced pneumonia was diagnosed in two wild boars; one of these contained OvGHV2 DNA, with MCFV antigens identified in the other. Additionally, MCFV tissue antigens were detected within pulmonary epithelial cells of the lungs with and without pulmonary disease. Collectively, OvGHV2 was detected in 37.5% (9/24) of all wild boars, with detection occurring in the organs of 57.1% (8/14) wild boars and the oral cavity of one animal. These results demonstrated that these wild boars were subclinically infected by OvGHV2, and that infection produced typical pulmonary alterations. In addition, the detection of OvGHV2 within the oral cavity of one wild boar may suggest that this animal may be a potential disseminator of this pathogen to susceptible animal populations, including livestock and wildlife, acting as a possible bridge host for OvGHV2. Furthermore, infection by OvGHV2 probably occurred due to incidental contact with asymptomatic sheep maintained within the surrounding rural areas and not within the conservation units. [ABSTRACT FROM AUTHOR]

Published
2024
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22. Characterization of ovine gammaherpesvirus 2 in a goat by nanoplate digital PCR and other diagnostic methods

Author

Silva, Luara Evangelista, primary, Dall Agnol, Alais Maria, additional, Rodriguez, Maria Constanza, additional, Xavier, Ana Aparecida Correa, additional, Silva, Isabela Vaz, additional, Kioquetta, Júlio Adriano, additional, Guimarães, Nathalia Silva, additional, Rodrigues, Rafael Vince, additional, Pereira, Priscilla Fajardo Valente, additional, Almeida, Rafaelli Ferreira, additional, Alfieri, Amauri Alcindo, additional, and Headley, Selwyn Arlington, additional

Published
2023
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26. Disseminated melanized fungal infection due to Cladosporium halotolerans in a dog coinfected with canine adenovirus-1 and canine parvovirus-2

Author

Headley, Selwyn Arlington, de Mello Zanim Michelazzo, Mariana, Elias, Bruno, Viana, Nayara Emily, Pereira, Yuri Lima, Pretto-Giordano, Lucienne Garcia, da Silva, Jhonata Fragoso, da Silva, Felipe Eduardo Scardovelli, Vilas-Boas, Laurival Antonio, da Costa Flaiban, Karina Keller Marques, Alfieri, Amauri Alcindo, and Gomes, Lucas Alécio

Published
2019
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29. The Role of Mycoplasma bovirhinis in the Development of Singular and Concomitant Respiratory Infections in Dairy Calves from Southern Brazil.

Author

Frucchi, Ana Paula Souza, Dall Agnol, Alais Maria, Caldart, Eloiza Teles, Bronkhorst, Dalton Everton, Alfieri, Alice Fernandes, Alfieri, Amauri Alcindo, and Headley, Selwyn Arlington

Subjects
RESPIRATORY infections, CALVES, ANIMAL herds, MYCOPLASMA, MANNHEIMIA haemolytica, POULTRY farms, DAIRY farm management
Abstract

The role of Mycoplasma bovirhinis in the development of pulmonary disease in cattle is controversial and was never evaluated in cattle from Latin America. This study investigated the respiratory infection dynamics associated with M. bovirhinis in suckling calves from 15 dairy cattle herds in Southern Brazil. Nasal swabs were obtained from asymptomatic (n = 102) and calves with clinical manifestations (n = 103) of bovine respiratory disease (BRD) and used in molecular assays to identify the specific genes of viral and bacterial disease pathogens of BRD. Only M. bovirhinis, bovine coronavirus (BCoV), ovine gammaherpesvirus 2 (OvGHV2), Histophilus somni, Pasteurella multocida, and Mannheimia haemolytica were detected. M. bovirhinis was the most frequently diagnosed pathogen in diseased (57.8%; 59/102) and asymptomatic (55.3%; 57/103) calves at all farms. BCoV-related infections were diagnosed in diseased (52%; 53/102) and asymptomatic (51.4%; 53/103) calves and occurred in 93.3% (14/15) of all farms. Similarly, infectious due to OvGHV2 occurred in diseased (37.2%; 38/102) and asymptomatic (27.2%; /28/103) calves and were diagnosed in 80% (12/15) of all farms investigated. Significant statistical differences were not identified when the two groups of calves were compared at most farms, except for infections due to OvGHV2 that affected five calves at one farm. These results demonstrated that the respiratory infection dynamics of M. bovirhinis identified in Southern Brazil are similar to those observed worldwide, suggesting that there is not enough sufficient collected data to consider M. bovirhinis as a pathogen of respiratory infections in cattle. Additionally, the possible roles of BCoV and OvGHV2 in the development of BRD are discussed. [ABSTRACT FROM AUTHOR]

Published
2024
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33. Caprine toxoplasmosis in Southern Brazil: a comparative seroepidemiological study between the indirect immunofluorescence assay, the enzyme-linked immunosorbent assay, and the modified agglutination test

Author

Fortes, Maira Salomão, Lopes-Mori, Fabiana Maria Ruiz, Caldart, Eloiza Teles, Constantino, Caroline, Evers, Fernanda, Pagliari, Sthefany, de Almeida, Jonatas Campos, Barros, Luiz Daniel, Freire, Roberta Lemos, Garcia, João Luis, Headley, Selwyn Arlington, and Navarro, Italmar Teodorico

Published
2017
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42. Infectious Disease Agents Associated with Pulmonary Alterations in Aborted Bovine Fetuses

Author

de Oliveira, Thalita Evani Silva, primary, Scuisato, Gabriela Sanches, additional, Fritzen, Juliana Torres Tomazi, additional, Silva, Denise Correia, additional, Massi, Rodrigo Pelisson, additional, Pelaquim, Isadora Fernanda, additional, Silva, Luara Evangelista, additional, Flores, Eduardo Furtado, additional, Lima Santos, Renato, additional, Pretto-Giordano, Lucienne Garcia, additional, Lisbôa, Júlio Augusto Naylor, additional, Alfieri, Amauri Alcindo, additional, and Headley, Selwyn Arlington, additional

Published
2022
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48. Equine cutaneous pythiosis: a report of four cases

Author

Headley Selwyn Arlington and Arruda Junior Homero Neves

Subjects
pythiosis, Pythium insidiosum, horses, Agriculture, Agriculture (General), S1-972
Abstract

Cutaneous pythiosis is described in four horses in Northern Paraná, Brazil. All animals presented ulcerative, granulomatous, cutaneous lesions that did not invade adjacent muscular tissues. Histopathological evaluations revealed eosinophilic granulomatous reactions associated with intralesional hyphae suggestive of Pythium insidiosum observed at the margins of coagula. P. insidiosum hyphae were visualized by Gomori’s methenamine silver stain.

Published
2004

49. Ovine gammaherpesvirus 2 infections in cattle without typical manifestations of sheep-associated malignant catarrhal fever and concomitantly infected with bovine coronavirus

Author

Headley, Selwyn Arlington, primary, de Lemos, Gisele Augusta Amorim, additional, Dall Agnol, Alais Maria, additional, Xavier, Ana Aparecida Correa, additional, Depes, Victória Coronado Antunes, additional, Yasumitsu, Carolina Yuka, additional, Oliveira, Thalita Ernani Silva, additional, Silva, Luara Evangelista, additional, Faccin, Tatiane Cargnin, additional, Alfieri, Amauri Alcindo, additional, and Lisboa, Júlio Augusto Naylor, additional

Published
2021
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50. Canine distemper virus and canine adenovirus type-2 infections in neotropical otters (Lontra longicaudis) from Southern Brazil

Author

de Mello Zanim Michelazzo, Mariana, primary, Martinelli, Tayná Messias, additional, de Amorim, Vânia Regina Gonçalves, additional, Silva, Luara Evangelista, additional, Silva, Flávia Helena Pereira, additional, Xavier, Ana Aparecida Correa, additional, Cubas, Zalmir Silvino, additional, de Almeida, Rafaelli Ferreira, additional, de Moraes, Wanderlei, additional, and Headley, Selwyn Arlington, additional

Published
2021
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