Introduction: In Brazil, West Nile virus (WNV) was first detected, in 2018, in horses with neurological disease. Aim: We report the first case of WNV infection in a horse from Ceará state and the complete genome sequence of an isolate from Espírito Santo state. Both infections occurred in 2019. Methods: WNV was isolated from the tissues of a horse with neurological signs in Espírito Santo and sequenced by MiSeq. Results: Phylogenetic analysis revealed that the isolate belongs to lineage 1a, clustering with the NY99 strain, a strain that has not circulated in the USA since 2005. Conclusions: Our findings reinforce the hypothesis that WNV has been silently circulating in Brazil for many years.
CITATION STYLE
Siconelli, M. J. L., Jorge, D. M. de M., de Castro-Jorge, L. A., Fonseca-Júnior, A. A., Nascimento, M. L., Floriano, V. G., … da Fonseca, B. A. L. (2021). Evidence for current circulation of an ancient west nile virus strain (Ny99) in brazil. Revista Da Sociedade Brasileira de Medicina Tropical, 54. https://doi.org/10.1590/0037-8682-0687-2020
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