Advance in Effect of Veterinary Drug Residues on Ecological Environment

Thousands of tons of pharmaceutically active substances are used in veterinary medicines in intensive livestock and poultry production,but most of the drugs are poorly absorbed by animals and excreted with the animal feces. The veterinary medicines can cause various kinds of harmful impact to the environment.Now the relevant research has been a hot all over the world. With the feces excreted to the environment,the veterinary medicines can be accumulated in the soil and water,and produce all sorts of reaction. Some medicines can cause toxic effect to animals,plants and microorganisms. The article summarized the residue,the environmental impact,the transformation and the development direction of the veterinary medicine in the environment to supply frame of reference for further research.