Autochthonous circulation of Saint Louis encephalitis and West Nile viruses in the Province of La Rioja, Argentina
| Autor: | María Elisa Rivarola, Agustín Quaglia, Gonzalo Batallan, Sebastián F. Flores, Brenda S. Konigheim, Marta S. Contigiani, Mauricio Beranek, Laura Beatriz Tauro, Walter Ricardo Almirón, Magdalena Laurito, Andrés M. Visintin |
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| Rok vydání: | 2021 |
| Předmět: |
Microbiology (medical)
Culex viruses Argentina Encephalitis Virus St. Louis Zoology Antibodies Viral Microbiology 03 medical and health sciences Seroepidemiologic Studies medicine Animals Seroprevalence Ecosystem 0303 health sciences Melanerpes cactorum Encephalitis St. Louis biology 030306 microbiology virus diseases General Medicine medicine.disease biology.organism_classification Leptotila verreauxi Flavivirus Saint Louis encephalitis Enzootic West Nile virus Encephalitis |
| Zdroj: | Revista Argentina de Microbiología. 53:154-161 |
| ISSN: | 0325-7541 |
| Popis: | St. Louis encephalitis (SLEV) and West Nile (WNV) arboviruses, which circulate in Argentina, are maintained in enzootic transmission cycles involving Culex mosquitoes (vectors) and birds belonging to orders Passeriformes and Columbiformes (amplifier hosts). The objective of this work was to determine the circulation of both viruses among wild birds in a semiarid ecosystem in the Province of La Rioja through a serologic survey. During spring 2013 and fall 2014, a total of 326 wild birds belonging to 41 species were captured in areas close to the cities of La Rioja and Chilecito, in the Province of La Rioja. While exposure to SLEV and WNV was analyzed in birds' serum through neutralizing antibody detection, viral circulation was estimated through apparent seroprevalence of neutralizing antibodies. The exposure of the avian community to viruses was 3.02% for SLEV and 1.89% for WNV, while 1.19% corresponded to coinfections. Our study confirms for the first time the circulation of SLEV and WNV in wild birds in the Province of La Rioja. Moreover, it is the first study to register neutralizing antibodies for flavivirus in the species Leptotila verreauxi (White-tipped Dove) (WNV) and Melanerpes cactorum (White-fronted Woodpecker) (SLEV). These results suggest that in semiarid ecosystems from northwestern Argentina the requirements and conditions for amplification and enzootic maintenance of SLEV and WNV would be present. |
| Databáze: | OpenAIRE |
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