title: Some characteristics and antibiotic resistance of anaerobic bacteria from the ceca and colons of pigs fed chlortetracycline-containing and unmedicated diets.
abstract: Morphology and end product patterns were used to group 112 bacterial isolates from the ceca and colons of pigs fed unmedicated and chlortetracycline-containing diets. Most of the isolates (68%) were resistant to chlortetracycline (greater than 4 micrograms/ml). Chlortetracycline resistance was associated with all groups of anaerobic and facultative bacteria.
mesh_terms: D000821:Animal Feed; D000818:Animals; D001421:Bacteria, Anaerobic / Q000187:drug effects*; D002432:Cecum / Q000382:microbiology*; D002751:Chlortetracycline / Q000494:pharmacology*; D003106:Colon / Q000382:microbiology*; D004352:Drug Resistance, Microbial; D013552:Swine / Q000382:microbiology*
chemical_list: D002751:Chlortetracycline