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From June 14 to August 30, 2001 and June 10 to August 22, 2002, the mosquitoes of Oberlin, Ohio were surveyed and tested for West Nile virus (WNV). Mosquitoes were trapped weekly using gravid traps and CO2-baited Centers for Disease Control light traps at seven sites in 2001 and eight sites in 2002 in woodlots within the city limits. A total of 12,151 mosquitoes, representing 14 species and one species group, were collected in gravid traps, with Culex pipiens/restuans being the most abundant, followed by Ochlerotatus triseriatus. In light traps, 12,510 mosquitoes were collected, with Aedes vexans being the most abundant, followed by Culex pipiens/restuans. All gravid trap collections were tested for WNV via reverse transcriptase-polymerase chain reaction. West Nile virus was first detected in July 2002. Of all species tested, the Cx. pipiens/restuans species group exhibited the highest minimum infection rate (MIR) and the greatest percentage of positive pools. Both the MIR and percent of positive pools increased significantly with the date, although abundance of Cx. pipiens/restuans in gravid trap collections did not.
Received August 18, 2003. Accepted for publication December 20, 2003.
Acknowledgments: We thank Robert Restifo, Jeremy Wittie, and Steven Chordas (Vector-Borne Disease Program, Ohio Department of Health, Columbus, OH) and Scott Pozna and Kenneth Pierce (Lorain County General Health District, Elyria, OH) for various forms of support during the course of this project. We also thank Keith Tarvin, David Andrew, and Bradley White for critical review of this manuscript.
Financial support: This work was supported by the Mellon Foundation, Oberlin College, and the Vector-Borne Disease Program, Ohio Department of Health.
Authors addresses: Nicole Z. Mans, Sasha E. Yurgionas, Mary C. Garvin, John D. Bresky, and Alexander C. Galaitsis, Department of Biology, Oberlin College, 119 Woodland Street, Oberlin, OH 44074. Richard Gary and Ojimadu A. Ohajuruka, Vector-Borne Disease Program, Ohio Department of Health, 900 Freeway Dr. N., Columbus, OH 43229.
Reprint requests: Mary C. Garvin, Department of Biology, Oberlin College, 119 Woodland Street, Oberlin, OH 44074, Telephone: 440-775-6402, Fax: 440-775-8960, E-mail: mary.garvin{at}oberlin.edu.
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B. J. WHITE, D. R. ANDREW, N. Z. MANS, O. A. OHAJURUKA, and M. C. GARVIN WEST NILE VIRUS IN MOSQUITOES OF NORTHERN OHIO, 2003. Am J Trop Med Hyg, August 1, 2006; 75(2): 346 - 349. [Abstract] [Full Text] [PDF] |
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