| characterization of integrons in escherichia coli of the normal intestinal flora of swine. | multiresistant escherichia coli isolates of the normal intestinal flora of healthy fattening pigs were examined for the presence of integron class 1 by xl (extra long) pcr. the class 1 integron was detected in 17 isolates originating from 14 healthy animals on seven different farms. one isolate contained two class 1 integrons. the inserted gene cassettes were characterized by dna sequencing and pcr. the ant(3")-ia gene responsible for resistance to streptomycin/spectinomycin was inserted in all ... | 1999 | 10647086 |