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A Community-Based Children's Pesticide Exposure Measurement Study in Jacksonville, Florida: Results from the Aggregate Exposure Assessment

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Abstract:Young children may be more susceptible to pesticides because they are undergoing rapid development and more likely to engage in activities in which they directly contact contaminated surfaces. As a result, children may be more exposed to pesticides through normal daily activities, as compared to adults, within the home. The EPA collaborated with the Duval County Health Department (DCHD, Jacksonville, FL) and the Centers for Disease Control and Prevention on a measurement study to characterize young children's (4 to 6 years) exposures to pesticides in residential environments in Jacksonville, FL.

The study examined potential exposures of young children to a large number of organophosphate and pyrethroid pesticides. The three-tiered study design consisted of the following:

- Tier 1: Recruitment of 200 children from County health clinics, completion of a questionnaire, and collection of a urine sample from each participating child;

- Tier 2: Collection of environmental screening samples (surface wipe, transferable residue, pesticide inventory, time activity diary, urine) at the homes of approximately 25% of the enrolled children;

- Tier 3: A detailed aggregate exposure assessment (air, surface wipe, transferable residue, duplicate diet, socks, pesticide inventory, time activity diary, urine) for nine of the homes sampled in tier 2. DCHD staff collected samples in tiers 1 and 2. EPA staff performed the aggregate exposure assessment at the nine homes in tier 3.

Results from the aggregate exposure assessment will be presented. The pesticide inventories showed that pyrethroids were the most commonly applied pesticides. Environmental, personal, and biological samples, as well as activity pattern data, were collected and aggregate exposure estimates were calculated. Preliminary analyses suggest that there is a correlation between the environmental loadings of cypermethrin and the urinary metabolites, cis- and trans-DCCA. Further analysis will be presented.

Although this work was reviewed by EPA and approved for publication, it may not necessarily reflect official Agency policy.
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Citation:Tulve, N. S., R. C. Fortmann, D. A. Whitaker, C. Croghan, A. Hilliard, and L. P. Naeher. A Community-Based Children's Pesticide Exposure Measurement Study in Jacksonville, Florida: Results from the Aggregate Exposure Assessment. Presented at International Society of Exposure Analysis 14th Annual Conference, Philadelphia, PA, October 17-21, 2004.
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Contact: Liz Hope - (919) 541-2785 or hope.elizabeth@epa.gov
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Division: Human Exposure & Atmospheric Sciences Division
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Branch: Exposure Measurements & Analysis Branch
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Product Type: Abstrct/Oral
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Presented: 10/20/2004
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