Fluctuation of drug-resistant Escherichia coli strains in adult chickens.
D000367:Age Factors; D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D002645:Chickens / Q000382:microbiology*; D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000187:drug effects*
D000900:Anti-Bacterial Agents