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Sci Total Environ. 2020 Mar 1;706:135692. doi: 10.1016/j.scitotenv.2019.135692. Epub 2019 Nov 22.

Concentration and environmental fate of ivermectin in floodplain wetlands: An ecosystem approach.

Author information

1
Instituto Nacional de Limnología (INALI-CONICET-UNL), Ciudad Universitaria, Paraje El Pozo, CP 3000 Santa Fe, Argentina. Electronic address: letimesa@hotmail.com.
2
Instituto Nacional de Limnología (INALI-CONICET-UNL), Ciudad Universitaria, Paraje El Pozo, CP 3000 Santa Fe, Argentina; Facultad de Bioquímica y Ciencias Biológicas - Escuela Superior de Sanidad "Dr. Ramón Carrillo", UNL, Ciudad Universitaria, Paraje El Pozo, 3000 Santa Fe, Argentina.
3
Instituto Nacional de Limnología (INALI-CONICET-UNL), Ciudad Universitaria, Paraje El Pozo, CP 3000 Santa Fe, Argentina; Facultad de Humanidades y Ciencias (UNL), Ciudad Universitaria, Paraje El Pozo, 3000 Santa Fe, Argentina.
4
Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), CONICET-CICPBA, Facultad de Ciencias Veterinarias, UNCPBA, Campus Universitario, 7000 Tandil, Argentina.

Abstract

Ivermectin (IVM) is commonly used for broad control of endo- and ecto- parasites in cattle. In wetlands of the Parana Medio River, cattle has been treated repeatedly with IVM for years and concerns have been raised on possible presence of the drug in these ecosystems. A field study was conducted to assess concentration of IVM in two wetlands subjected to different cattle use and frequency of IVM injection. Concentration of IVM in roots of macrophytes, Chironomus sp., Coelotanypus sp., Brachymesia furcata (larvae), Dero sp., Hyalella sp., Hirudinea, Planorbidae, Boana pulchella (larvae), Aphyocharax anisitsi and Serrapinnus calliurus were shown for the first time. Total concentration of IVM in the wetlands, and concentration in cattle manure, sediment, water and macrophytes increased with the number of treated cattle and frequency of IVM injections. Accumulation of IVM in aquatic assemblages is alarming because these organisms fulfill a key role in food webs, constituting a serious risk to human health. Management strategies should be implemented by farmers to keep recently treated animals away from watercourses to reduce the introduction of IVM into aquatic systems.

KEYWORDS:

Bioaccumulation; Biomagnification; Floodplain systems; Veterinary medical products

PMID:
31826804
DOI:
10.1016/j.scitotenv.2019.135692
[Indexed for MEDLINE]

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