Veterinary medicines in the environment

Area of Science:

• Environmental Science
• Ecotoxicology
• Veterinary Pharmacology

Background:

• Veterinary medicines are crucial for animal health but can impact the environment.
• Factors influencing environmental impact include physicochemical properties, usage patterns, and degradation rates.
• Understanding environmental entry routes and fate is essential for risk assessment.

Purpose of the Study:

• To review the environmental impact of veterinary medicines.
• To identify key factors affecting their fate and transport in the environment.
• To summarize ecotoxicity data and highlight knowledge gaps.

Main Methods:

• Literature review of factors influencing environmental impact.
• Analysis of veterinary medicine entry routes into terrestrial and aquatic environments.
• Summary of monitoring data and ecotoxicity studies.

Main Results:

• Veterinary medicines enter the environment via manure, slurry, direct excretion, and aquaculture.
• Sheep dip chemicals, antibiotics, and anthelmintics are frequently detected.
• Partitioning and persistence vary significantly, with K(d) values ranging widely.
• Avermectins and sheep dip chemicals show high toxicity to aquatic organisms at low concentrations.

Conclusions:

• Veterinary medicine environmental impact is multifactorial, influenced by usage and environmental conditions.
• Current monitoring confirms environmental presence, with specific compounds posing risks.
• Further research is needed to fully assess subtle, long-term ecotoxicological effects, especially for antibiotics.