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. 2003 Dec;9(12):1604-7.
doi: 10.3201/eid0912.030564.

West Nile virus in Mexico: evidence of widespread circulation since July 2002

José G Estrada-Franco  1 , Roberto Navarro-Lopez, David W C Beasley, Lark Coffey, Anne-Sophie Carrara, Amelia Travassos da Rosa, Tamara Clements, Eryu Wang, George V Ludwig, Arturo Campomanes Cortes, Pedro Paz Ramírez, Robert B Tesh, Alan D T Barrett, Scott C Weaver
Affiliations

West Nile virus in Mexico: evidence of widespread circulation since July 2002

José G Estrada-Franco et al. Emerg Infect Dis. 2003 Dec.

Abstract

West Nile virus (WNV) antibodies were detected in horses from five Mexican states, and WNV was isolated from a Common Raven in the state of Tabasco. Phylogenetic studies indicate that this isolate, the first from Mexico, is related to strains from the central United States but has a relatively high degree of sequence divergence.

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Figures

Figure 1
Figure 1
Map showing the Mexican states sampled for antibodies to West Nile virus and Venezuelan equine encephalitis virus in equines. Unshaded states were not sampled. The location of the West Nile virus isolation from a dead Common Raven is shown by a star.
Figure 2
Figure 2
Phylogenetic tree, derived by maximum likelihood (ML) by using prM-E sequences for West Nile virus (WNV) isolates including the 2003 Mexican Raven isolate. Strains are indicated by country or abbreviated state (U.S.) followed by year and strain designation. GenBank accession nos. are in parentheses. A lineage 2 WNV strain (AY277251) was used to root the tree. Numbers indicate bootstrap values from 1,000 replicates.
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