Prevalence And Antibiotic Susceptibility Pattern Of Escherichia Coli O157h7 In Raw Beef Mutton And Chevon At Addis Ababa Abattoir Enterprise And Selected Retail Shops Addis Ababa Ethiopia

A study on the prevalence of Escheriehia coli O157:H7 and antimicrobial susceptibility test was undertaken on beef, mutton (sheep meat) and chevon (goat’s meat) obtained from Addis Ababa abattoir enterprise and retail shops at Addis Ababa from August 2011 to April 2012. A total of 384 raw meat samples consisting of 64 beef, 64 mutton and 64 chevon were collected each from the abattoir and retail shops that mean a total of 128 beef, 128 mutton and 128 chevon were analyzed during the study period. E. coli O157:H7 was isolated and identified according to OmniLog identification technique. Out of 384 meat samples examined, 39 (10.2%) were positive to E. coli O157:H7. Among the meat samples examined, beef was the most frequently contaminated with E. coli O157:H7 with an overall prevalence of 13.3%. Of the examined samples, 9.4% mutton and 7.8% chevon were also positive for E. coli O157:H7. With regard to meat source, the prevalence rates of E. coli O157:H7 at abattoir and at selected retail shops were recorded to be 5.7% and 14.6%, respectively. No significant variation in prevalence rate among the three types of meat types (p>0.05) was observed. However, significant differences in prevalence of E. coli O157:H7 was observed among meat sources (p

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