[Pathogenicity of West Nile virus: molecular markers].

: The review describes the phenotypic properties, structure, and expression pattern of West Nile virus genome (Flaviviridae, Flavivirus, Japanese encephalitis antigenic complex), as well as the clinical picture and pathogenesis of its etiologically related disease West Nile fever. It also analyzes the available data on the impact of genetic mutations in the genome on the biological properties of the virus.