Effect of prior immunization of bactericidal action of penicillin in vivo.
D000900:Anti-Bacterial Agents; D007114:Immunization; D010406:Penicillins / Q000494:pharmacology*; D013290:Streptococcal Infections
D000900:Anti-Bacterial Agents; D010406:Penicillins
PENICILLIN/effects; STREPTOCOCCAL INFECTIONS/experimental