ATTRACTIVENESS AND REPELLENCY OF MAN TO MOSQUITO BITES.
Annual progress rept., 1 July 63-1 Mar 64,
STANFORD RESEARCH INST MENLO PARK CALIF
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In cooperation with the Department of Dermatology of the University of Californias San Francisco Medical Center, the attractiveness of body odors and sweat of humans to the female Aedes aegypti mosquito were investigated. A simplified olfactometer and a membrane feeding device have been used to evaluate the degree of attractiveness of human sweat, and of extracts of human sweat and body odors. The permeability of water vapor, carbon dioxide, and volatile organic materials for feeding experiments, and of the plastic bags used for collection of sweat and body odors was determined. Lyophilized human sweat from volunteers found to be attractive toward mosquito biting was found to be very attractive to female Aedes aegypti. The attractiveness varied with concentration of the residue left after removal of the water. Sweat from a subject not bitten by Aedes aegypti is being studied. Arm vapors diluted in a stream of air are very attractive to female Aedes aegypti. It has been found that the attractive factors present in arm vapors can be removed by passing the air stream containing it over activated charcoal. Isolation and identification of this factors is in progress. Author