1972 Volume 13 Issue 5 Pages 388-391
The strains of enteropathogenic Escherichia coli isolated from commercial foods in Niigata prefecture from 1969 to 1971 were surveyed for drug resistance to several chemotherapeutic drugs and distribution of R factors. Of 28 strains were examined, and 8 strains (8/28) were resistant to a number of chemotherapeutic drugs such as tetracycline (TC), chloramphenicol (CM), streptomycin (SM) and sulfonamide (SA), however, all of the isolates were sensitive to kanamycin, nalidixic acid and aminobenzyl penicillin. Of these resistant strains, 7 strains (7/8) were resistant to two or more drugs, and one strain (1/8) to only one drug. The majority of these drug risistant strains were the isolates from fresh meats.
It was also found that 4 strains (4/8) of these resistant strains carried R factors. All of the resistance patterns of R factors were multiple drug resistance.
