Effects of penicillin and broad-spectrum antibiotics on the emergence of a gram-negative bacillary flora in the upper respiratory tract of infants.
D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D006090:Gram-Negative Bacteria; D006801:Humans; D007223:Infant; D010406:Penicillins / Q000494:pharmacology*; D012137:Respiratory System; D014132:Trachea
D000900:Anti-Bacterial Agents; D010406:Penicillins
ANTIBIOTICS/effects; PENICILLIN/effects; RESPIRATORY TRACT