Letter: Ampicillin-resistant haemophilus influenzae.
D000667:Ampicillin / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D002675:Child, Preschool; D006193:Haemophilus influenzae / Q000187:drug effects*; D006801:Humans; D008297:Male; D008583:Meningitis, Haemophilus / Q000188:drug therapy / Q000382:microbiology; D008826:Microbial Sensitivity Tests; D010403:Penicillin Resistance
D000667:Ampicillin