In late summer and fall 1997, Aedes albopictus mosquitoes were found in Peoria, Illinois, a long recognized focus of La Crosse virus transmission. Larvae were found in tires and other artificial containers, biting adults were recovered, and eggs were collected in oviposition traps within a 25-ha area. One chipmunk trapped < 0.25 km from the infested area tested positive for neutralizing antibodies against La Crosse virus.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2640261PMC
http://dx.doi.org/10.3201/eid0404.980413DOI Listing

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