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Volume 9, Number 11—November 2003


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

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Table 1

Nucleotide mutations in sequences of the prM gene of 22 West Nile virus isolates obtained during 2001 and 2002 compared to WN-NY99a

Strain Source Collected RNA origin prM (501 nt)
491 (prM9) 507 549 621 660 679 (prM72) 690 807 903
(AF196835) Flamingo 06/01/99 Brain A (Lys) A U A C U (Ser) C C G
Harris Co., TX
(AY185906) Bluejay 06/11/02 Brain/Vero U
Harris Co., TX
(AY185907) Bluejay 06/10/02 Brain/Vero U
Co., TX - 1 Culexquinquefasciatus 08/06/02 BHK G (Arg) U
Co., TX - 2 Culexquinquefasciatus 09/17/02 BHK U
Co., TX Culexquinquefasciatus 09/25/02 BHK U
Co., TX Culexrestuans 09/30/02 Vero
Co., TX Culexquinquefasciatus 10/23/02 BHK U
Co., TX Culextarsalis 09/18/02 BHK U
El Paso
Co., TX Culextarsalis 08/26/02 Vero U
Illinois - 1 Culex pipiens 08/02/02 Vero A U
Illinois - 2 Dog 08/01/02 Kidney/Vero G U
Alabama - 1 Culexquinquefasciatus 10/05/01 Vero
Alabama -2 Crow 09/10/01 Brain/Vero
Colorado Red-tailed Hawk 08/01/02 Brain/Vero U
Louisiana Culex salinarius 08/06/02 Vero U
Galveston Co.,
TX-1 (AY185914) Bluejay 08/02/02 Vero G A (Thr)
Galveston Co.,
TX-2 (AY185913) Bluejay 07/19/02 Vero A
Co., TX-3 Culexquinquefasciatus 08/21/02 Vero
Co., TX - 1 Culexquinquefasciatus 08/06/02 BHK
Co., TX - 2 Culexquinquefasciatus 07/02/02 BHK A
Co., TX - 3 Human 08/24/02 CSF/Vero
Co., TX Culexquinquefasciatus 07/03/02 Vero A

*Nucleotide (nt) numbers correspond to those of WN-NY99 (GenBank accession no. AF196835); in brackets for individual residues are the deduced amino acid changes.f

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