Residues of veterinary drugs consist of primary forms metabolites and impurities of medicines or chemical materials which accumulate in the zooblasts tissues organs and edible products after animals such as livestocks and poultries have been contacted with medicines .

兽药残留是给畜禽等动物使用药物后蓄积在动物细胞、组织和器官内以及可食性产品中的药物或 化学物的原形、代谢产物和杂质。