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*†
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 | ||||
| WN-NY99 (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 | ||||||||
| Nueces Co., TX - 1 | Culex quinquefasciatus | 08/06/02 | BHK | G (Arg) | U | |||||||
| Nueces Co., TX - 2 | Culex quinquefasciatus | 09/17/02 | BHK | U | ||||||||
| Gregg Co., TX | Culex quinquefasciatus | 09/25/02 | BHK | U | ||||||||
| Tarrant Co., TX | Culex restuans | 09/30/02 | Vero | |||||||||
| Wichita Co., TX | Culex quinquefasciatus | 10/23/02 | BHK | U | ||||||||
| Randall Co., TX | Culex tarsalis | 09/18/02 | BHK | U | ||||||||
| El Paso Co., TX | Culex tarsalis | 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 | Culex quinquefasciatus | 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 | ||||||||
| Galveston Co., TX-3 | Culex quinquefasciatus | 08/21/02 | Vero | |||||||||
| Jefferson Co., TX - 1 | Culex quinquefasciatus | 08/06/02 | BHK | |||||||||
| Jefferson Co., TX - 2 | Culex quinquefasciatus | 07/02/02 | BHK | A | ||||||||
| Jefferson Co., TX - 3 | Human | 08/24/02 | CSF/Vero | |||||||||
| Orange Co., TX | Culex quinquefasciatus | 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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