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1 September 2009 Rapid Assessment of Mosquitoes and Arbovirus Activity after Floods in Southeastern Kansas, 2007
Bruce A. Harrison, Parker B. Whitt, Lesa F. Roberts, Jennifer A. Lehman, Nicole P. Lindsey, Roger S. Nasci, Gail R. Hansen
Author Affiliations +
Abstract

A rapid assessment was conducted in July–August 2007 to determine the impact of heavy rains and early summer floods on the mosquitoes and arbovirus activity in 4 southeastern Kansas counties. During 10 days and nights of collections using different types and styles of mosquito traps, a total of 10,512 adult female mosquitoes representing 29 species were collected, including a new species record for Kansas (Psorophora mathesoni). High numbers of Aedes albopictus were collected. Over 4,000 specimens of 4 Culex species in 235 species-specific pools were tested for the presence of West Nile, St. Louis, and western equine encephalitis viruses. Thirty pools representing 3 Culex species were positive for West Nile virus (WNV). No other arboviruses were detected in the samples. Infection rates of WNV in Culex pipiens complex in 2 counties (10.7/1,000 to 22.6/1,000) and in Culex salinarius in 1 county (6.0/1,000) were sufficiently high to increase the risk of transmission to humans. The infection rate of WNV in Culex erraticus was 1.9/1,000 in one county. Two focal hot spots of intense WNV transmission were identified in Montgomery and Wilson counties, where infection rates in Cx. pipiens complex were 26/1,000 and 19.9/1,000, respectively. Despite confirmed evidence of WNV activity in the area, there was no increase in human cases of arboviral disease documented in the 4 counties for the remainder of 2007.

Bruce A. Harrison, Parker B. Whitt, Lesa F. Roberts, Jennifer A. Lehman, Nicole P. Lindsey, Roger S. Nasci, and Gail R. Hansen "Rapid Assessment of Mosquitoes and Arbovirus Activity after Floods in Southeastern Kansas, 2007," Journal of the American Mosquito Control Association 25(3), 265-271, (1 September 2009). https://doi.org/10.2987/08-5754.1
Published: 1 September 2009
JOURNAL ARTICLE
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KEYWORDS
Kansas
mosquitoes
rapid assessment
West Nile virus
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