[Possible effects on the environment of antibiotic residues in animal manure].

After application to animals veterinary drugs can enter the environment faeces. Little is known about the impact these veterinary drugs can have on the environment. Antimicrobial drugs, ended up in the soil via manure, could affect microorganisms and thus disturb ecological cycles. A study of the literature on the impact on the environment of a number of important (groups of) antibiotics and an antiparasitic agent revealed that little is known about most of these agents.