Potential exposure of children and adults to cypermethrin following use of indoor insecticide foggers |
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Authors: | James J Keenan Helen Vega Robert I Krieger |
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Institution: | Department of Entomology, Personal Chemical Exposure Program , University of California Riverside , Riverside, California, USA |
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Abstract: | The magnitude and distribution of cypermethrin from total release, over-the-counter foggers was studied in a test room and in residences to facilitate evaluation of regulatory exposure algorithms and new human exposure assessments based upon urine biomonitoring. Surface residue (SR) was evenly distributed in a small test room (3.6 μ g cypermethrin/cm2) where thorough mixing of the aerosol occurred. In a residence SR was significantly affected by room size and distance from the fogger. Air levels in the residence were as high as 30 μ g cypermethrin/cm3 after 4.5 h. The availability of surface residues was measured with an automated surface cotton cloth wipe and ethyl acetate extraction. Only 5% of the SR was available from nylon carpet. Tile, wood and linoleum resulted in 30, 10, and 10% of SR being available, respectively. These data are used to estimate cypermethrin exposure of children and adults for comparison with existing regulatory reference dosages and exposure assessments based upon biomonitoring. |
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Keywords: | Pyrethroid exposure children cypermethrin indoor fogger |
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