Transmission of endemic St Louis encephalitis virus strains by local Culex quinquefasciatus populations in Córdoba, Argentina

Background St Louis encephalitis virus (SLEV) is a re-emerging human pathogen widely distributed in the American continent. Although it is not fully understood, the SLEV transmission network may involve Culex quinquefasciatus mosquitoes as vectors and Columbidae species as hosts. Methods To calculat...

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Bibliographic Details
Published in:Transactions of the Royal Society of Tropical Medicine and Hygiene 2013-05, Vol.107 (5), p.332-334
Main Authors: Diaz, Luis Adrián, Flores, Fernando Sebastián, Beranek, Mauricio, Rivarola, Maria Elisa, Almirón, Walter Ricardo, Contigiani, Marta Silvia
Format: Article
Language:English
Subjects:
Animals
Arboviral encephalitis
Arboviroses
Argentina
Biological and medical sciences
Chickens - virology
Culex - virology
Disease Susceptibility
Encephalitis Virus, St. Louis - isolation & purification
Encephalitis, St. Louis - epidemiology
Encephalitis, St. Louis - transmission
Encephalitis, St. Louis - virology
Endemic Diseases
General aspects
Human viral diseases
Humans
Infectious diseases
Insect Vectors - virology
Medical sciences
Miscellaneous
Tropical viral diseases
Viral diseases
Viremia - transmission
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Summary:Background St Louis encephalitis virus (SLEV) is a re-emerging human pathogen widely distributed in the American continent. Although it is not fully understood, the SLEV transmission network may involve Culex quinquefasciatus mosquitoes as vectors and Columbidae species as hosts. Methods To calculate infection rates, we inoculated Cx. quinquefasciatus mosquitoes from Córdoba, Argentina by feeding them on viremic chicks. Results We observed differences in infection rate among the viral strains, the highest rate (78/87 mosquitoes, 90.8%) being seen in strain 78V-6507. After re-feeding on susceptible chicks, mosquitoes were able to transmit the virus. Conclusion Our findings suggest that Cx. quinquefasciatus populations are susceptible to and able to transmit different SLEV strains.
ISSN:0035-9203
1878-3503
DOI:10.1093/trstmh/trt023