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Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff

Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff

Published on: May 15, 2017

Postapplication Fipronil Exposure Following Use on Pets.

R C Cochran¹, Liu Yu², R I Krieger²

¹a risksciences.net LLC , Sacramento , California , USA.

Journal of Toxicology and Environmental Health. Part A

|October 6, 2015

Summary

This summary is machine-generated.

Toddlers may face higher fipronil exposure risks from pets. Secondary environmental exposure to this insecticide is minimal, suggesting direct pet contact is the primary concern for household occupants.

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Area of Science:

Environmental Science
Toxicology
Public Health

Background:

Fipronil is a widely used pyrazole insecticide and acaricide for controlling pests like insects, ticks, and mites on pets.
Assessing human exposure to pesticides used in residential settings is crucial for understanding potential health risks.

Purpose of the Study:

To estimate short-term and long-term postapplication exposure of residents to fipronil.
To evaluate secondary environmental exposure pathways in households with treated pets.

Main Methods:

Absorbed doses were estimated using U.S. Environmental Protection Agency (U.S. EPA) 2012 standard operating procedures (SOPs) for postapplication exposure.
Acute (24-h) absorbed doses were calculated for residents, including toddlers and adults.
Secondary exposure was assessed by monitoring pet owner socks to measure residue transfer from the household environment.

Main Results:

Estimated acute postapplication absorbed doses for toddlers (1-2 yr) reached up to 0.56 μg/kg-d.
Toddler exposures were approximately five times higher than adult exposures.
Secondary environmental exposures were over ten times lower than direct pet contact exposures, deemed negligible.

Conclusions:

Toddlers may experience higher acute absorbed doses of fipronil compared to adults in households with treated pets.
Direct contact with treated pets is the predominant route of fipronil exposure for residents.
Secondary environmental exposure to fipronil residues in the household is minimal and likely not a significant risk factor.