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Detection of Vaccinia virus during an outbreak of exanthemous oral lesions in Brazilian equids

Abrahão, J. S. ; Souza Trindade, G. ; Pereira‐Oliveira, G. ; Oliveira Figueiredo, P. ; Costa, G. ; Moreira Franco‐Luiz, A. P. ; Lopes Assis, F. ; Bretas de Oliveira, D. ; Mattos Paim, L. R. ; Araújo Oliveira, C. E. ; Lemos Maia Neto, A. ; Geessien Kroon, E.

Equine veterinary journal, 2017-03, Vol.49 (2), p.221-224 [Periódico revisado por pares]

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Título:
Detection of Vaccinia virus during an outbreak of exanthemous oral lesions in Brazilian equids
Autor: Abrahão, J. S. ; Souza Trindade, G. ; Pereira‐Oliveira, G. ; Oliveira Figueiredo, P. ; Costa, G. ; Moreira Franco‐Luiz, A. P. ; Lopes Assis, F. ; Bretas de Oliveira, D. ; Mattos Paim, L. R. ; Araújo Oliveira, C. E. ; Lemos Maia Neto, A. ; Geessien Kroon, E.
Assuntos: Animals ; Brazil - epidemiology ; Deoxyribonucleic acid ; Disease Outbreaks - veterinary ; DNA ; emerging infectious disease ; Epidemiology ; Equidae ; Exanthema - pathology ; Exanthema - veterinary ; Exanthema - virology ; Fragments ; Homology ; Horse ; Lesions ; Mouth Diseases - epidemiology ; Mouth Diseases - pathology ; Mouth Diseases - veterinary ; Mouth Diseases - virology ; orthopoxvirus ; Phylogenetics ; Phylogeny ; Polymerase chain reaction ; Primers ; Vaccinia - diagnosis ; Vaccinia - epidemiology ; Vaccinia - pathology ; Vaccinia - veterinary ; Vaccinia virus ; Vaccinia virus - isolation & purification ; Viruses
É parte de: Equine veterinary journal, 2017-03, Vol.49 (2), p.221-224
Notas: The Summary is available in Chinese ‐ see Supporting information.
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Descrição: Summary Reasons for performing study In August 2014, an outbreak of oral exanthematous disease in equids was reported in Brazil, affecting 11 donkeys and 3 mules. Objectives To investigate if Vaccinia virus (VACV) was the aetiological agent in this outbreak. Study design Investigation of clinical cases using serological, molecular and phylogenetic approaches. Methods To analyse the presence of neutralising antibodies against VACV, samples were submitted in triplicate to a plaque‐reduction neutralisation test (PRNT50%). On the basis of previous studies which detected VACV DNA in sera, we submitted extracted DNA samples to different polymerase chain reaction (PCR) platforms targeting Orthopoxvirus (OPV) genes (C11R, A56R and A26L). The PCR products were directly sequenced in both orientations using specific primers and capillary electrophoresis. The alignment and phylogenetic analysis of the A26L and A56R nucleotide sequences (maximum likelihood) were prepared with the obtained nucleotide fragments. Results Serological and molecular data suggested VACV as the aetiological agent. The neutralising antibodies against OPV were detected in 5 (55.5%) of the equids, with titres ≥40 neutralising u/ml. Based on the results obtained from all PCR platforms, all samples were positive for OPV: 9 (100%) for A56R, 4 (44.4%) for C11R and 3 (33.3%) for A26L. The alignment of the nucleotide sequences of the A26L and A56R fragments revealed that the samples were highly similar to the homologous genes from other Brazilian VACV Group 1 isolates (98.8% identity on average). Furthermore, both the A26L and A56R sequences showed signature deletions also present in the sequences of Group 1 VACV isolates from Brazil. Conclusions Our data raises questions about the role of equids in the chain of VACV epidemiology. The surveillance of equids in VACV‐affected areas worldwide is relevant.
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Idioma: Inglês

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Detection of Vaccinia virus during an outbreak of exanthemous oral lesions in Brazilian equids

Abrahão, J. S. ; Souza Trindade, G. ; Pereira‐Oliveira, G. ; Oliveira Figueiredo, P. ; Costa, G. ; Moreira Franco‐Luiz, A. P. ; Lopes Assis, F. ; Bretas de Oliveira, D. ; Mattos Paim, L. R. ; Araújo Oliveira, C. E. ; Lemos Maia Neto, A. ; Geessien Kroon, E.

United States: Wiley Subscription Services, Inc

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