Inability to Transfer Antibiotic Resistance inEscherichia colion Meat Surfaces

摘要

ABSTRACTThe surfaces of beef and chicken samples were inoculated with a mixture of a donor (resistant to tetracycline, streptomycin, chloramphenicol, ampicillin, neomycin and sulphonamide), and a recipient strain ofEschetichia coli.Meats were maintained at 20°C and 4°C and sampled daily. Transfer of antibiotic resistance could not be demonstrated at either temperature. The recipient strain survived without significant growth at 4°C, but failure to transfer antibiotic resistance at 20°C was considered to be due to the sessile growth of the organisms enclosed in a dense glycocalyx, precluding close contact between the organi