Well-water consumption and Parkinson's disease in rural California

Investigators have hypothesized that consuming pesticide-contaminated well water plays a role in Parkinson's disease (PD), and several previous epidemiologic studies support this hypothesis. We investigated whether consuming water from private wells located in areas with documented historical p...

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Veröffentlicht in:Environmental health perspectives 2009-12, Vol.117 (12), p.1912-1918
Hauptverfasser: Gatto, Nicole M, Cockburn, Myles, Bronstein, Jeff, Manthripragada, Angelika D, Ritz, Beate
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container_end_page 1918
container_issue 12
container_start_page 1912
container_title Environmental health perspectives
container_volume 117
creator Gatto, Nicole M
Cockburn, Myles
Bronstein, Jeff
Manthripragada, Angelika D
Ritz, Beate
description Investigators have hypothesized that consuming pesticide-contaminated well water plays a role in Parkinson's disease (PD), and several previous epidemiologic studies support this hypothesis. We investigated whether consuming water from private wells located in areas with documented historical pesticide use was associated with an increased risk of PD. We employed a geographic information system (GIS)-based model to estimate potential well-water contamination from agricultural pesticides among 368 cases and 341 population controls enrolled in the Parkinson's Environment and Genes Study (PEG). We separately examined 6 pesticides (diazinon, chlorpyrifos, propargite, paraquat, dimethoate, and methomyl) from among 26 chemicals selected for their potential to pollute groundwater or for their interest in PD, and because at least 10% of our population was exposed to them. Cases were more likely to have consumed private well water and to have consumed it on average 4.3 years longer than controls (p = 0.02). High levels of possible well-water contamination with methomyl [odds ratio (OR) = 1.67; 95% confidence interval (CI), 1.00-2.78]), chlorpyrifos (OR = 1.87; 95% CI, 1.05-3.31), and propargite (OR = 1.92; 95% CI, 1.15-3.20) resulted in approximately 70-90% increases in relative risk of PD. Adjusting for ambient pesticide exposures only slightly attenuated these increases. Exposure to a higher number of water-soluble pesticides and organophosphate pesticides also increased the relative risk of PD. Our study, the first to use agricultural pesticide application records, adds evidence that consuming well water presumably contaminated with pesticides may play a role in the etiology of PD.
doi_str_mv 10.1289/ehp.0900852
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subjects Adult
Aged
Agricultural chemicals
Chlorpyrifos
Consumption
Contamination
Exposure
Female
Geographic information systems
Health aspects
Herbicides
Humans
Male
Middle Aged
Parkinson Disease - etiology
Parkinson's disease
Pesticides
Pesticides - toxicity
Risk
Risk factors
Rural Health
Water Pollutants, Chemical - toxicity
Water Supply - analysis
Well waters
title Well-water consumption and Parkinson's disease in rural California
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