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1 March 2012 Sindbis Virus Infection Alters Blood Feeding Responses and DEET Repellency in Aedes aegypti (Diptera: Culicidae)
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Abstract

Aedes aegypti (L.) (Diptera: Culicidae) female mosquitoes infected systemically with Sindbis virus (SINV) took longer than uninfected mosquitoes to locate and fully engorge on blood. On days 7 and 14 postexposure, blood feeding took 1.3 and 1.5 times longer in mosquitoes with a disseminated SINV infection, respectively. SINV dissemination did not affect the average weight of unfed Ae. aegypti, but did result in a 10 and 12% increase in blood imbibed compared with mosquitoes without a positive SINV dissemination and non-SINV-exposed mosquitoes, respectively. Ae. aegypti mosquitoes with a disseminated SINV infection fed an average of 4 h sooner than uninfected mosquitoes when offered a bloodmeal contained inside a DEET (N,N-diethyl-3-methylbenzamide) saturated (30%) bovine sausage casing. Together, these results indicate that behavioral changes in mosquito host-seeking, blood feeding and sensitivity to DEET occurred in mosquitoes after SINV infection and dissemination.

© 2012 Entomological Society of America
Whitney A. Qualls, Jonathan F. Day, Rui-De Xue, and Doria F. Bowers "Sindbis Virus Infection Alters Blood Feeding Responses and DEET Repellency in Aedes aegypti (Diptera: Culicidae)," Journal of Medical Entomology 49(2), 418-423, (1 March 2012). https://doi.org/10.1603/ME11102
Received: 9 May 2011; Accepted: 1 December 2011; Published: 1 March 2012
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