Changes in serological type and antibiotic resistance of Lancefield group D streptococci in chickens receiving dietary chlortetracycline.
D000818:Animals; D002645:Chickens; D002751:Chlortetracycline / Q000494:pharmacology*; D004032:Diet; D004352:Drug Resistance, Microbial; D007422:Intestines / Q000382:microbiology*; D013291:Streptococcus / Q000187:drug effects*
D002751:Chlortetracycline
CHLORTETRACYCLINE/effects; INTESTINES/microbiology; STREPTOCOCCUS/effect of drugs on