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Volume 9, Number 7—July 2003

Dispatch

Serologic Evidence of West Nile Virus Infection in Horses, Yucatan State, Mexico

María A. Loroño-Pino*†, Bradley J. Blitvich*, José A. Farfán-Ale†, Fernando I. Puerto†, José M. Blanco‡, Nicole L. Marlenee*, Elsy P. Rosado-Paredes†, Julian E. García-Rejón†, Duane J. Gubler§, Charles H. Calisher*, and Barry J. Beaty*Comments to Author 
Author affiliations: *Colorado State University, Fort Collins, Colorado, USA; †Universidad Autonoma de Yucatan, Merida, Yucatan, Mexico; ‡Universidad Autonoma de Yucatan, Xmatkuil, Yucatan, Mexico; §Centers for Disease Control and Prevention, Fort Collins, Colorado, USA

Main Article

Table 2

Summary of horses with HI assay or epitope-blocking ELISA antibodies to flavivirusesa

Horse Sampling date Study site Age
(y) Sex Clinical symptoms Outcome HI assay titer % inhibition by blocking ELISAb
3.1112Gc 6B6C-1d
H-60
July 2, 2002
Merida
8
Male
Gastrointestinal (recurrent colic)
Survived
10
0
59
H-117
July 5, 2002
Tizimin
7
Male
None
Survived
10
84
93
H-126
July 5, 2002
Tizimin
2
Male
None
Survived
40
87
93
H-134
July 5, 2002
Tizimin
3
Female
None
Survived
10
11
0
H-141
July 5, 2002
Tizimin
10
Male
None
Survived
80
5
47
H-252 Oct. 15, 2002 Caucel 3 Male Neurologic and muscular symptoms Euthanized 20 64 25

aHI, hemagglutination-inhibition; ELISA, enzyme-linked immunosorbent assay.

bInhibition values >30% are considered significant.

cMAb 3.1112G is WNV-specific.

dMAb 6B6C-1 is flavivirus group–reactive.

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