Development of resistance to penicillin and to chlortetracycline in psittacosis virus.
D002691:Chlamydophila psittaci / Q000187:drug effects*; D002751:Chlortetracycline / Q000494:pharmacology*; D006801:Humans; D010406:Penicillins / Q000494:pharmacology*; D009956:Psittacosis
D010406:Penicillins; D002751:Chlortetracycline
CHLORTETRACYCLINE/effects; MIYAGAWANELLA/effect of drugs on; PENICILLIN/effects