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Volume 9, Number 11—November 2003

Research

Genetic Variation among Temporally and Geographically Distinct West Nile Virus Isolates, United States, 2001, 2002

C. Todd Davis*†, David W.C. Beasley*†, Hilda Guzman*†, Pushker Raj‡, Mary D’Anton‡, Robert J. Novak§, Thomas R. Unnasch¶, Robert B. Tesh*†, and Alan D.T. Barrett*†Comments to Author 
Author affiliations: *Center for Biodefense and Emerging Diseases, Galveston, Texas, USA; †University of Texas Medical Branch, Galveston, Texas, USA; ‡Texas Department of Health-Rabies/Arbovirus Section, Austin, Texas, USA; §Illinois Natural History Survey, Champaign, Illinois, USA; ¶University of Alabama at Birmingham, Birmingham, Alabama, USA

Main Article

Figure 3

Cladogram based on maximum parsimony analysis comparing a 2,004-nucleotide sequence of 22 West Nile virus isolates collected during 2001 and 2002 with a homologous region of WN virus isolates collected in 1999, 2000, and 2001 from the northeastern United States. Numbers indicate bootstrap confidence estimates based on 500 replicates for clades supported to the right. Numbers in parenthesis represent GenBank accession numbers.

Figure 3. . Cladogram based on maximum parsimony analysis comparing a 2,004-nucleotide sequence of 22 West Nile virus isolates collected during 2001 and 2002 with a homologous region of WN virus isolates collected in 1999, 2000, and 2001 from the northeastern United States. Numbers indicate bootstrap confidence estimates based on 500 replicates for clades supported to the right. Numbers in parenthesis represent GenBank accession numbers.

Main Article

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