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Escherichia coli O157:H7 (E. coli O157:H7) have frequently been associated with food borne illness and are considered as most serious of known food borne pathogens leading to severe illnesses and high mortality rates in humans. Most of outbreaks were traced to raw meat and raw milk consumption, as well as to dairy products such as yogurt and cheese derived from raw milk. Out of 200 samples examined, 40 (20%) and 7 (3.5%) of the samples were positive to E. coli and E. coli O157:H7 respectively. The highest isolation of E. coli was from cheese (40%), followed by raw milk (32%), yogurt (25.71%), beef (13.84%), and pasteurized milk (0%). Among E. coli O157:H7 isolates, the highest isolation was from raw milk (12%) followed by cheese (5.71%) and meat (3.07%). However, no E. coli O157:H7 was isolated from pasteurized milk and yogurt. Antibiotic susceptibility profile showed that E. coli was resistant for vancomycin (89.74%), ampicillin (76.92%) and streptomycin (69.23%). The analysis showed that, 92.5% of isolates showed multidrug resistance comprising 2–4 antimicrobials. The occurrence of E. coli O157:H7 and its multiple antibiotic resistant profiles shows a risk for public health and food safety as well as animal production. These findings stress the need for an integrated control of E. coli O157:H7 from farm production to consumption of food of animal origin.

international journal of food contamination

RETRACTED ARTICLE: Occurrence and antimicrobial susceptibility profile of Escherichia coli O157:H7 from food of animal origin in Bishoftu town, Central Ethiopia