PENICILLIN in germ-free chicks.
D000818:Animals; D002645:Chickens; D006128:Growth / Q000187:drug effects*; D006801:Humans; D008460:Meat; D010406:Penicillins / Q000494:pharmacology*; D011200:Poultry
D010406:Penicillins
FOWLS, DOMESTIC; GROWTH/effect of drugs on; PENICILLIN/effects