Volume 77, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


Three species of mosquitoes (, , and ) collected in Texas were compared with respect to their relative susceptibility to infection with West Nile virus (WNV) strain 114. Oral infection and dissemination rates were 73% infected with 86% dissemination for , 13% infected with 100% dissemination for , and 100% infected and disseminated for . The oral infectious dose required to establish a 50% infection rate was also determined. All feral mosquito species were found to be susceptible to oral infection with WNV (114) in a similar range: (6.37 log 50% tissue culture infectious doses [TCID]/5 μL), (6.17 log TCID/5 μL), and (5.33 log TCID/5 μL). These data demonstrate that both and from Texas are susceptible to infection with WNV at a similar range to and may represent a threat of WNV transmission to humans because of host preferences.


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  • Received : 05 Jun 2007
  • Accepted : 22 Jul 2007

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