Volume 78, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


Venezuelan equine encephalitis virus (VEEV) continues to circulate enzootically in Mexico with the potential to re-emerge and cause disease in equines and humans in North America. We infected two geographically distinct mosquito populations of eastern form columbiae (Chiapas, Mexico and Texas, United States) and one mosquito population of western form toltecum (California, United States) with epizootic and enzootic IE VEEV and epizootic IAB VEEV. We detected no differences between epizootic and enzootic IE viruses in their ability to infect any of the mosquito populations analyzed, which suggested that neither species selects for epizootic IE viruses. f. columbiae (Texas) were significantly less susceptible to infection by epizootic IE than f. columbiae (Mexico). f. toltecum populations were more susceptible than f. columbiae populations to epizootic IE and IAB viruses.


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  • Received : 22 Feb 2007
  • Accepted : 09 Dec 2007

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