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Rev Soc Bras Med Trop. 2014 Jul;47(4):414-7.

A Saint Louis encephalitis and Rocio virus serosurvey in Brazilian horses.

Author information

1
Centro de Pesquisa em Virologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
2
Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brazil.
3
Escola de Ciências Veterinárias, Universidade Federal do Mato Grosso do Sul, Campo Grande, MS, Brazi.
4
Academia Militar Agulhas Negras, Resende, Rio de Janeiro, RJ.
5
Unidade Acadêmica de Medicina Veterinária, Universidade Federal de Campina Grande, Campina Grande, PB, Brasil.
6
Faculdade de Medicina Veterinária, Universidade de Uberaba, Uberaba, MG, Brazil.

Abstract

INTRODUCTION:

Arboviruses are an important public health problem in Brazil, in especially flaviviruses, including the Saint Louis encephalitis virus (SLEV) and the Rocio virus (ROCV), are especially problematic. These viruses are transmitted to humans or other vertebrates through arthropod bites and may cause diseases with clinical manifestations that range from asymptomatic infection, viral hemorrhagic fever to encephalitis.

METHODS:

A serological survey of horses from various regions of Brazil using an enzyme-linked immunosorbent assay (ELISA) with recombinant SLEV domain III peptides and ROCV E protein as antigens.

RESULTS:

Overall, 415 (55.1%) of the 753 horses that were screened were seropositive for flavivirus and, among them, monotypic reactions were observed to SLEV in 93 (12.3%) and to ROCV in 46 (6.1%). These results suggested that these viruses, or other closely related viruses, are infecting horses in Brazil. However, none of the studied horses presented central nervous system infection symptoms.

CONCLUSIONS:

Our results suggest that SLEV and ROCV previously circulated among horses in northeast, west-central and southeast Brazil.

PMID:
25229279
DOI:
10.1590/0037-8682-0117-2014
[Indexed for MEDLINE]
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