| Organophosphate Pesticide Exposure and Work in Pome Fruit: Evidence for the Take-Home Pesticide Pathway Gloria D. Coronado,1 Eric M. Vigoren,2 Beti Thompson,1 William C. Griffith,2 and Elaine M. Faustman2 1Cancer Prevention Research Program, Seattle, Washington, USA; 2Department of Environmental and Occupational Health Sciences, School of Public Health and Community Medicine, University of Washington, Seattle, Washington, USA Abstract
Organophosphate (OP) pesticides are commonly used in the United States, and farmworkers are at risk for chronic exposure. Using a sample of 218 farmworkers in 24 communities and labor camps in eastern Washington State, we examined the association between agricultural crop and OP pesticide metabolite concentrations in urine samples of adult farmworkers and their children and OP pesticide residues in house and vehicle dust samples. Commonly reported crops were apples (71.6%) , cherries (59.6%) , pears (37.2%) , grapes (27.1%) , hops (22.9%) , and peaches (12.4%) . Crops were grouped into two main categories: pome fruits (apples and pears) and non-pome fruits. Farmworkers who worked in the pome fruits had significantly higher concentrations of dimethyl pesticide metabolites in their urine and elevated azinphos-methyl concentrations in their homes and vehicles than workers who did not work in these crops. Among pome-fruit workers, those who worked in both apples and pears had higher urinary metabolites concentrations and pesticide residue concentrations in dust than did those who worked in a single pome fruit. Children living in households with pome-fruit workers were found to have higher concentrations of urinary dimethyl metabolites than did children of non-pome-fruit workers. Adult urinary concentrations showed significant correlations with both the vehicle and house-dust azinphos-methyl concentrations, and child urinary concentrations were correlated significantly with adult urinary concentrations and with the house-dust azinphos-methyl concentration. The results provide support for the take-home pathway of pesticide exposure and show an association between measures of pesticide exposure and the number of pome-fruit crops worked by farmworkers. Key words: children of farmworkers, contamination, crops, farmworkers, house dust, occupational exposure, pesticides, take-home pathway, urinary metabolites, vehicle dust, WinBUGS. Environ Health Perspect 114:999–1006 (2006) . doi:10.1289/ehp.8620 available via http://dx.doi.org/ [Online 13 March 2006]
Address correspondence to G.D. Coronado, Cancer Prevention Research Program, Fred Hutchinson Cancer Research Center, P.O. Box 19024, 1100 Fairview Ave. N, M3-B232, Seattle, WA 98109 USA. Telephone: (206) 667-4216. Fax: (206) 667-5977. E-mail: gcoronad@fhcrc.org We acknowledge R. Fenske, J. Kissel, and J. Shirai for providing the sampling and quality assurance protocols, training field staff, and developing the analytical procedures for the samples. We acknowledge members of our community advisory board for designing and carrying out the project. Although the research described in this article has been funded in part by the by the U.S. Environmental Protection Agency (R826886) and the National Institutes of Health (P01 ES09601) , it has not been subjected to either agency's required peer and policy review and therefore does not necessarily reflect the views of either agency, and no official endorsement should be inferred. The authors declare they have no competing financial interests. Received 31 August 2005 ; accepted 13 March 2006.
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