Difference in the rate of ampicillin--resistant Haemophilus influenzae in rural and urban Nebraska.
D000667:Ampicillin / Q000494:pharmacology*; D002648:Child; D002675:Child, Preschool; D006192:Haemophilus Infections / Q000188:drug therapy / Q000453:epidemiology*; D006193:Haemophilus influenzae / Q000187:drug effects*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D009329:Nebraska; D010403:Penicillin Resistance; D012423:Rural Health; D014504:Urban Health
D000667:Ampicillin