Objectives: West Nile virus (WNV) is a vector-borne Flavivirus that is transmitted in an enzootic cycle between birds and by mosquitoes; incidental transmission to humans and horses occurs during periods of intense viral amplification (Castillo-Olivares et al., 2004). Mosquitoes of the genus Culex are the main vectors of WNV. A Previous study demonstrated that WNV circulates in Portugal at least since 2004 (Bar...
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