Resistance of H. influenzae to ampicillin.
D000667:Ampicillin / Q000627:therapeutic use*; D002648:Child; D006193:Haemophilus influenzae / Q000187:drug effects*; D006801:Humans; D010033:Otitis Media / Q000188:drug therapy*; D010403:Penicillin Resistance
D000667:Ampicillin