Contamination of Frozen Broiler Chicken Meats with Antimicrobial Resistant Thermophilic Campylobacter in Morogoro, Tanzania |

Purpose: Majority of the human bacterial gastroenteritis cases in both developed and developing countries in the world are caused by thermo tolerant Campylobacter spp, with C. jejuni and C. coli being more involved. These bacteria live in poultry and other animal’s intestinal tracts without causing disease symptoms. Improper handling of carcasses during slaughter and evisceration increases the chance of contaminating the outer skin. Poor meat handling in the kitchen and poor storage during refrigeration causes cross contamination. Contamination of Frozen Broiler Chicken Meats with Antimicrobial Resistant Thermophilic Campylobacter in Morogoro, Tanzania.

Methods: This cross-sectional study examined the occurrence of antimicrobial resistant thermophilic Campylobacter in frozen chicken meats in Morogoro Municipality. A total of 272 frozen broiler chicken carcasses were obtained from supermarkets (n=90), meat shops (n=90) and restaurants (n=92). Each carcass was divided into three parts i.e. breast, thighs and wing+neck, rinsed in peptone water. The rinses were then enriched in 5ml of Bolton broth in microerophilic atmosphere at 42ºC for 24hrs. Then the broth was streaked on Modified Charcoal Cefoperazone Deoxycholate Agar (mCCDA) plates followed by incubation at 42ºC for 48 hrs. Presumptive colonies of Campylobacter spp. were sub cultured onto Mueller Hinton Agar and incubated at 42ºC for 48 hrs to obtain pure colonies. Pure Campylobacter colonies were then subjected to preliminary identification using biochemical tests and further confirmed by polymerase chain reaction (PCR). Antimicrobial Susceptibility testing was performed on C. Jejuni isolates by disc diffusion method on Mueller-Hinton agar supplemented with 5% of horse blood. The isolates were tested for resistance against ten antimicrobials namely tetracycline, gentamycin, ciprofloxacin, azithromycin, erythromycin, norfloxacin, chloramphenical, amoxicilin, nalidixic acid and cephalocin.

Conclusion: This study confirms that in our setting a high frequency of commercial broiler chickens are positive for antimicrobial resistant Campylobacter at the time of slaughter. This phenomenon derives in high contamination of carcasses during the slaughter process thereby constituting a substantial public health hazard. Freezing of carcasses does not completely remove this bacterium as seen from this study. Control strategies for these pathogens at flock level are recommended to avoid contamination of the final product. Animal products should be properly handled and thoroughly cooked in order to make sure that safe products are consumed.

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