Phylogenetic Characteristics of West Nile Virus Isolated From Mosquitoes in West Kazakhstan.

West Nile virus is widespread in southern Russia, where the fever appears annually. Since Western Kazakhstan borders on southern Russia, we examined mosquitoes in this region for the presence of West Nile virus. Virus was detected in a small proportion of mosquitoes (3/239 pools) and isolates are related to strains from Volgograd, Russia.