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Title: | Serological Evidence of Exposure to Saint Louis Encephalitis and West Nile Viruses in Horses of Rio de Janeiro, Brazil | Authors: | Chalhoub, Flávia Löwen Levy Horta, Marco Aurélio Pereira Alcantara, Luiz Carlos Junior Morales, María Alejandra Dos Santos, Lilha Maria Barbosa Guerra-Campos, Vinícius Rodrigues, Cintia D S Santos, Carolina C Mares-Guia, Maria Angélica M Pauvolid-Corrêa, Alex de Filippis, Ana Maria Bispo |
Keywords: | Virus de la Encefalitis de San Luis;Virus del Nilo Occidental;Caballos | Issue Date: | 6-Nov-2022 | Journal: | Viruses | Series/Report no.: | Viruses;14(11)2022:1-17 | Abstract: | Infections with arboviruses are reported worldwide. Saint Louis encephalitis (SLEV) and West Nile (WNV) viruses are closely related flaviviruses affecting humans and animals. SLEV has been sporadically detected in humans, and corresponding antibodies have been frequently detected in horses throughout Brazil. WNV was first reported in western Brazil over a decade ago, has been associated with neurological disorders in humans and equines and its prevalence is increasing nationwide. Herein, we investigated by molecular and serological methods the presence of SLEV and WNV in equines from Rio de Janeiro. A total of 435 serum samples were collected from healthy horses and tested for specific neutralizing antibodies by plaque reduction neutralization test (PRNT90). Additionally, samples (serum, cerebrospinal fluid, central nervous system tissue) from 72 horses, including horses with neurological disorders resulting in a fatal outcome or horses which had contact with them, were tested by real-time reverse transcription-polymerase chain reaction (RT-qPCR) for both viruses. Adopting the criterion of four-fold antibody titer difference, 165 horses (38%) presented neutralizing antibodies for flaviviruses, 89 (20.4%) for SLEV and five (1.1%) for WNV. No evidence of SLEV and WNV infection was detected by RT-qPCR and, thus, such infection could not be confirmed in the additional samples. Our findings indicate horses of Rio de Janeiro were exposed to SLEV and WNV, contributing to the current knowledge on the distribution of these viruses in Brazil. |
Description: | Fil: Chalhoub, Flávia Löwen Levy. Laboratório de Flavivírus, Oswaldo Cruz Foundation; Brasil Fil: Horta, Marco Aurélio Pereira. Biosafety Level 3 Facility (BSL-3), Fundação Oswaldo Cruz; Brasil Fil: Alcantara, Luiz Carlos Junior. Laboratório de Flavivírus, Oswaldo Cruz Foundation; Brasil Fil: Morales, Alejandra. Instituto Nacional de Enfermedades Virales Humanas; Argentina Fil: Dos Santos, Lilha Maria Barbosa. Laboratório de Flavivírus, Oswaldo Cruz Foundation; Brasil Fil: Guerra-Campos, Vinícius. Laboratório de Flavivírus, Oswaldo Cruz Foundation; Brasil Fil: Rodrigues, Cintia D S. Laboratório de Flavivírus, Oswaldo Cruz Foundation; Brasil Fil: Santos, Carolina C. Laboratório de Flavivírus, Oswaldo Cruz Foundation; Brasil Fil: Mares-Guia, Maria Angélica M. Laboratório de Flavivírus, Oswaldo Cruz Foundation; Brasil Fil: Pauvolid-Corrêa, Alex. Laboratório de Virologia Animal, Setor de Medicina Veterinária Preventiva e de Saúde Pública do Departamento de Veterinária da Universidade Federal de Viçosa (UFV); Brasil Fil: de Filippis, Ana Maria Bispo. Laboratório de Flavivírus, Oswaldo Cruz Foundation; Brasil |
URI: | http://sgc.anlis.gob.ar/handle/123456789/2564 | DOI: | 10.3390/v14112459 |
Appears in Collections: | Artículos |
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10.3390v14112459.pdf | 1.9 MB | Adobe PDF | View/Open |
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