Volume 9, Number 12—December 2003
Dispatch
West Nile Virus in Mexico: Evidence of Widespread Circulation since July 2002.
José G. Estrada-Franco*, Roberto Navarro-Lopez†, David W.C. Beasley*, Lark L. Coffey*, Anne-Sophie Carrara*, Amelia Travassos da Rosa*, Tamara Clements‡, Eryu Wang*, George V. Ludwig‡, Arturo Campomanes Cortes†, Pedro Paz Ramirez†, Robert B. Tesh*, Alan D.T. Barrett*, and Nikos Vasilakis*
Table 1
Serologic analysisa of 22 horse serum samples from five Mexican states, positive for West Nile virus antibodies, July 2002–March 2003b
| WNV serologic findings | HI SLEV | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| State, locality |
Sample no. |
Date |
Age |
Sex |
IgG-E |
IgM |
IgG |
PRNT |
HI |
|||||
| Veracruz, Minatitlan |
VER-015 |
Oct 28, 2002 |
7 y |
M |
pos |
1,600 |
400 |
>320 |
20 |
20 |
||||
| Veracruz, Minatitlan |
VER-011 |
Oct 28, 2002 |
18 m |
M |
pos |
neg |
400 |
>320 |
160 |
neg |
||||
| Veracruz, Hidalgotitlan |
VER-017 |
Oct 29, 2002 |
8 m |
M |
pos |
12,800 |
neg |
>320 |
>640 |
160 |
||||
| Veracruz, Texistepec |
VER-26 |
Oct 29, 2002 |
2 y |
M |
pos |
neg |
100 |
40 |
160 |
neg |
||||
| Veracruz, Texistepec |
VER-025 |
Nov 7, 2002 |
18 m |
M |
pos |
6,400 |
neg |
>320 |
>640 |
160 |
||||
| Veracruz, J. Carranza |
VER-036 |
Nov 11, 2002 |
7 m |
M |
pos |
neg |
6,400 |
>320 |
>640 |
40 |
||||
| Veracruz, Angel R Cabada |
406 |
Mar 20, 2003 |
13 m |
F |
pos |
neg |
400 |
>320 |
80 |
neg |
||||
| Veracruz, Cosamaloapan |
187 |
Aug 28, 2002 |
5 y |
F |
pos |
neg |
1,600 |
>320 |
160 |
20 |
||||
| Yucatan, Merida |
389 |
Mar 7, 2003 |
4 y |
F |
pos |
neg |
1,600 |
nt |
80 |
20 |
||||
| Yucatan, Tizimin |
391 |
Mar 1, 2003 |
5 y |
M |
pos |
neg |
1,600 |
160 |
40 |
20 |
||||
| Chihuahua, Ojinaga |
210 |
Oct 20, 2002 |
2 y |
M |
neg |
1,600 |
neg |
40 |
320 |
40 |
||||
| Coahuila, Cd Acuna |
112 |
Oct 14, 2002 |
3 y |
M |
pos |
1,600 |
neg |
80 |
20 |
20 |
||||
| Coahuila, Hidalgo |
4 |
Sep 1, 2002 |
5 |
F |
pos |
400 |
100 |
>320 |
>640 |
20 |
||||
| Coahuila, Villa Union |
26 |
Nov 2, 2002 |
4 y |
M |
pos |
400 |
100 |
>320 |
320 |
80 |
||||
| Coahuila, Nava |
67 |
Jul 11, 2002 |
7 y |
M |
pos |
400 |
100 |
>320 |
320 |
20 |
||||
| Coahuila, P. Negras |
56 |
Nov 5, 2002 |
2 y |
M |
pos |
6,400 |
100 |
>320 |
>640 |
40 |
||||
| Coahuila, Zaragoza |
39 |
Oct 10, 2002 |
5 y |
F |
pos |
neg |
400 |
>160 |
320 |
20 |
||||
| Coahuila, Morelos |
51 |
Oct 5, 2002 |
7 y |
M |
pos |
neg |
100 |
>160 |
160 |
40 |
||||
| Tamaulipas, Diaz Ordaz |
268 |
Nov 7, 2002 |
8 y |
F |
pos |
12,800 |
1,600 |
40 |
320 |
40 |
||||
| Tamaulipas, Camargo |
279 |
Nov 11, 2002 |
4 y |
F |
pos |
12,800 |
3,200 |
>320 |
320 |
80 |
||||
| Tamaulipas, Rio Bravo |
349 |
Nov 5, 2002 |
8 y |
M |
pos |
neg |
400 |
80 |
80 |
neg |
||||
| Tamaulipas, Victoria | 344 | Nov 7, 2002 | 2 y | M | pos | neg | 6,400 | >320 | 160 | 20 | ||||
aTiters expressed as reciprocal of dilution; all tests were enzyme-linked immunosorbent assays unless otherwise noted; all tests were against WNV (West Nile virus) unless otherwise noted. bSLEV, St. Louis encephalitis virus; Ig, immunoglobin; G-E, recombinant domain III of E protein; PRNT, plaque reduction neutralization test; HI, hemagglutination inhibition test.
Page created: February 10, 2011
Page updated: February 10, 2011
Page reviewed: February 10, 2011
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