Nonuniform dermal deposition patterns during occupational exposure to pesticides.
Arch Environ Contam Toxicol 1990 May; 19(3):332-337
Deposition patterns were investigated following mixing and application of pesticides in two different agricultural environments, primarily focusing on the question of uniform dermal exposure over specific body regions. Two worker studies provided the data for this investigation. One was a study of citrus orchard airblast applications where exposure was measured by the patch technique, the fluorescent tracer technique and biological monitoring. The second study measured mixer and handgunner exposures in greenhouses to a fungicide. Individual body regions did not register uniform deposition of pesticide residue. Highly variable amounts were detected on the exposed surface areas of the upper body regions of orchard airblast workers. The deposition in these workers represented 4 to 22% of the total regional surface areas. Work activity and type of application determined the deposition pattern formed. The ventral segment of the forearm was the area of highest exposure for mixers, whereas the dorsal segment was highest for applicators. The front of the head registered three times the exposure that the side of the head did for airblast applicators, but was three times lower than the level recorded among mixers. A two to eight fold difference in head exposure levels was noted as a result of using different patches to estimate the levels. The author states that such differences in dermal exposure data are a source of substantial uncertainty in exposure and risk assessments for agricultural workers.
NIOSH-Publication; NIOSH-Grant; Dermatitis; Agricultural-chemicals; Agricultural-workers; Pesticides; Skin-exposure; Fungicides; Occupational-exposure; Sampling-methods
Biomedical & Environ Hlth Scis University of California School of Public Health Berkeley, Calif 94720
Archives of Environmental Contamination and Toxicology
University of California Berkeley, Berkeley, California