Streptococcal respiratory infections.
D010406:Penicillins / Q000031:analogs & derivatives; D012137:Respiratory System; D012140:Respiratory Tract Diseases; D012141:Respiratory Tract Infections; D013290:Streptococcal Infections / Q000628:therapy*; D013291:Streptococcus
D010406:Penicillins
PENICILLIN/derivatives; RESPIRATORY TRACT/diseases; STREPTOCOCCAL INFECTIONS/therapy