The case for penicillin.
D000038:Abscess / Q000188:drug therapy / Q000662:veterinary*; D000818:Animals; D005334:Fever / Q000188:drug therapy / Q000662:veterinary; D006734:Horse Diseases / Q000188:drug therapy*; D006736:Horses; D010406:Penicillins / Q000008:administration & dosage* / Q000009:adverse effects; D012187:Retroperitoneal Space