Ampicillin is one of the most common semi-synthesis antibiotics. It has strong sterilizing ability and low toxicity. Ampicillin has a wider sterilizing range than penicillin G, and it's active to both G+ and G-. Ampicillin was often used to treat animals' inflammation and infection. If the animal was slaughtered or milked before ampicillin metabolized completely, there would have ampicillin residue animal food. When people eat these food, ampicillin residue remain in the food would induce anti-a...