A saint louis encephalitis and rocio virus serosurvey in Brazilian horses

Jaqueline Raymondi Silva, Marilia Farignoli Romeiro, William Marciel de Souza, Thiago Demarchi Munhoz, Gustavo PuíA Borges, Otavio Augusto Brioschi Soares, Carlos Henrique Coelho De Campos, RosâNgela Zacarias Machado, Maria Luana Cristiny Rodrigues Silva, Joice Lara Maia Faria, Juliana Helena Chávez, Luiz Tadeu Moraes Figueiredo

Research output: Contribution to journalArticlepeer-review


Introduction: Arboviruses are an important public health problem in Brazil, in especially fl aviviruses, 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 fl avivirus 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.

Original languageEnglish (US)
Pages (from-to)414-417
Number of pages4
JournalRevista da Sociedade Brasileira de Medicina Tropical
Issue number4
StatePublished - Jul 1 2014
Externally publishedYes


  • Arbovirus
  • Brazil
  • Epidemiology
  • Rocio virus
  • Saint Louis encephalitis virus
  • Serosurvey

ASJC Scopus subject areas

  • Parasitology
  • Microbiology (medical)
  • Infectious Diseases


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