Antibiotic resistance of Escherichia coli O157:H7 and O157:NM isolated from animals, food, and humans

Antibiotic resistance was determined for 118 E. coli O157:H7 and 7 O157:NM isolates from animals, foods, and humans. Among the 125 isolates, 30 (24%) were resistant to at least one antibiotic and 24 (19%) were resistant to three or more antibiotics. Cattle isolates had the highest rate (34%) of anti...

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Bibliographic Details
Published in:Journal of food protection 1998-11, Vol.61 (11), p.1511-1514
Main Authors: Meng, J, Zhao, S, Doyle, M.P, Joseph, S.W
Format: Article
Language:English
Subjects:
Animals
Anti-Bacterial Agents - pharmacology
antibiotics
Bacteriology
Biological and medical sciences
Cattle
drug resistance
Drug Resistance, Microbial
Drug Resistance, Multiple
Escherichia coli
Escherichia coli Infections - microbiology
Escherichia coli O157 - drug effects
Escherichia coli O157 - isolation & purification
Food Microbiology
Fundamental and applied biological sciences. Psychology
Humans
Meat - microbiology
Microbial Sensitivity Tests
Microbiology
Milk - microbiology
Pathogenicity, virulence, toxins, bacteriocins, pyrogens, host-bacteria relations, miscellaneous strains
Sheep - microbiology
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Summary:Antibiotic resistance was determined for 118 E. coli O157:H7 and 7 O157:NM isolates from animals, foods, and humans. Among the 125 isolates, 30 (24%) were resistant to at least one antibiotic and 24 (19%) were resistant to three or more antibiotics. Cattle isolates had the highest rate (34%) of antibiotic resistance. The seven resistant food isolates were all from ground beef. The most frequent resistance type overall was streptomycin-sulfisoxazole-tetracycline, which accounted for over 70% of the resistant strains. Two E. coli O157:NM isolates from cattle were resistant to six antibiotics: ampicillin, Kanamycin, sulfisoxazole, streptomycin, tetracycline, and ticarcillin. Streptomycin was the most common antibiotic to which E. coli O157:H7 and O157:NM were resistant (29 out of 30 isolates), followed by tetracycline (26 isolates). This study suggests that E. coli O157:H7 and O157:NM have developed resistance to antibiotics. Research is needed to define mechanisms of antibiotic resistance in E. coli O157:H7 and to minimize the development of resistance.
ISSN:0362-028X
1944-9097
DOI:10.4315/0362-028X-61.11.1511