| Registro completo |
| Provedor de dados: |
Ciência Rural
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| País: |
Brazil
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| Título: |
Experimental infection of horses with Vaccinia virus
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| Autores: |
Barbosa,Claudio Henrique Gonçalves
Sant'Ana,Fabiano José Ferreira de
Cargnelutti,Juliana Felipetto
Flores,Eduardo Furtado
Teixeira Neto,Antônio Raphael
Santana,Rosália Bezerra de
Reis Junior,Janildo Ludolf
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| Data: |
2016-03-01
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| Ano: |
2016
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| Palavras-chave: |
VACV
Experimental infection
Horses
Bovine vaccinia
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| Resumo: |
ABSTRACT: Vaccinia virus (VACV) is the etiologic agent of bovine vaccinia, an emerging zoonotic disease with potential health issues for dairy herds and humans. VACV may occasionally infect other species, including horses. In this sense, an outbreak of VACV disease in horses was described in Pelotas, RS, in 2008, where a co-infection with two VACV strains (named Pelotas Virus 1 [P1V] and Pelotas Virus 2 [P2V]) was detected. Considering the rare occurrence of VACV infection in horses, the objective of this study was to investigate the susceptibility and pathogenesis of VACV infection in this species. Six adult horses were inoculated with VACV P1V or P2V (106.3TCID50/ml) through scarification of the nasolabial surface and monitored for virological and clinical aspects during 28 days. Four inoculated horses (4/6) developed mild lesions in the site of inoculation. Ulcers and scabs restricted to inoculated areas were observed between days 2 and 8 post-inoculation (pi). Microscopically there were acanthosis, ballooning degeneration of the stratum spinosum, necrosis and loss of the epidermis. Infiltration of neutrophils, macrophages and lymphocytes were observed in the dermis. Intracytoplasmic eosinophilic inclusions were infrequently observed in degenerate keratinocytes from adjacent necrotic areas. Virus shedding was detected between days 4 and 8 pi by PCR and virus isolation (infectious virus) from the lesions of one horse inoculated with P2V. No neutralizing antibodies were detected in inoculated animals at day 28 pi. In summary, inoculation of horses with VACV P1V and P2V isolates resulted in a low level of replication and at low frequency, with mild cutaneous lesions, when compared with the course of infection of other susceptible species to VACV. Therefore, horses possibly have a low potential for viral maintenance and transmission to other species, albeit being susceptible to VACV infection.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000300519
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| Editor: |
Universidade Federal de Santa Maria
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| Relação: |
10.1590/0103-8478cr20150289
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| Formato: |
text/html
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| Fonte: |
Ciência Rural v.46 n.3 2016
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| Direitos: |
info:eu-repo/semantics/openAccess
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