Introductions of West Nile Virus Strains to Mexico

Abstract

Complete genome sequencing of 22 West Nile virus isolates suggested 2 independent introductions into Mexico. A previously identified mouse-attenuated glycosylation variant was introduced into southern Mexico through the southeastern United States, while a common US genotype appears to have been introduced incrementally into northern Mexico through the southwestern United States.

Keywords

• West Nile virus
• arbovirus
• flavivirus
• introduction
• equine
• avian