Volume 72, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


Epizootics of encephalitis in El Salvador killed 203 equines between November 2001 and April 2003. During an investigation of the outbreaks, 18 (25%) of 73 serum samples collected from stablemates of deceased animals in 2003 had antibodies to West Nile virus. Ten of these infections were confirmed by plaque reduction neutralization tests, suggesting West Nile virus has extended its range and spread to Central America.


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  • Received : 13 Sep 2004
  • Accepted : 03 Nov 2004

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