Fipronil washoff to municipal wastewater from dogs treated with spot-on products

The Science of the Total Environment
Jennifer TeerlinkRobert Budd

Abstract

Fipronil and fipronil degradates have been reported in treated wastewater effluent at concentrations that exceed USEPA Aquatic Life Benchmarks, posing a potential risk to the surface waters to which they discharge. Fipronil is a common insecticide found in spot-on flea and tick treatment products that have the potential for down-the-drain transport and direct washoff into surface water. Volunteers currently treating their dogs with a fipronil-containing spot-on product were recruited. Dogs were washed either 2, 7, or 28days after product application, and rinsate from 34 discrete bathing events were analyzed by LC-MS/MS for fipronil and fipronil degradates (collectively known as fiproles). Total fipronil application dosage ranged from 67.1-410.0mg per dog following manufacturers' recommendation based on dog body weight. Total mass of fiproles measured in rinsate ranged from 3.6-230.6mg per dog (0.2 ̶ 86.0% of mass applied). Average percentage of fiproles detected in rinsate generally decreased with increasing time from initial application: 21±22, 16±13, and 4±5% respectively for 2, 7, and 28days post application. Fipronil was the dominant fiprole, >63% of total fiproles for all samples and >92% of total fiproles in 2 and 7day sa...Continue Reading

Citations

May 28, 2019·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Cecilia TestaGianfranco Brambilla
Dec 5, 2019·AAPS PharmSciTech·Gabriela Carmelinda Martins Dos SantosYara Peluso Cid
Dec 17, 2019·Parasitology·João Vitor Barbosa Dos SantosYara Peluso Cid
Sep 6, 2020·The Veterinary Record·Rosemary Perkins
Jul 14, 2020·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Daniela R LachterCarlos German Masone
Oct 4, 2020·The Veterinary Record·John Hill
Oct 11, 2020·Environmental Pollution·Zachary CryderJay Gan
Nov 18, 2020·The Science of the Total Environment·Rosemary PerkinsDave Goulson
May 5, 2021·The Science of the Total Environment·Yina XieNan Singhasemanon
Aug 1, 2021·Journal of Veterinary Pharmacology and Therapeutics·Gabriela Carmelinda Martins Dos SantosYara Peluso Cid
Aug 2, 2019·Environmental Science & Technology·Allison R TaylorJay Gan

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