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Summarizes the results of studies in Mississippi, North Carolina and Virginia that assessed human exposure to ultra low value naled, permethrin and d-phenothrin used in emergency, large-scale mosquito control activities. Result of the 2002 West Nile virus epidemic in Mississippi; Number of people who were recruited on the study in North Carolina; Percentage of the respondents in the study in Virginia who provided pre-spray and post-spray exposure questionnaires and urine samples.

A total of 4,169 adult mosquitoes were aspirated from 3 tire disposal sites in North Carolina for virus assays. Aedes albopictus was the dominant species, with a relative abundance of approximately 99%. Potosi virus was isolated from one pool of 68 female Ae. albopictus. Priorities for future Potosi virus research and the implications of the North Carolina isolate are discussed.

The location of tick attachment sites on humans was determined by information provided by respondents to a questionnaire, and by submission of ticks, in counties that have historically had a high incidence of Rocky Mountain spotted fever in North Carolina. Information was gathered from May through September in 1989, 1990, and 1991. Dermacentor variabilis (Say) made up 94% of the collections. Most (50%) were taken from the head; a sizable portion was removed from the legs (22%). The epidemiological implications and potential use of this information in a public information campaign are discussed.