Contamination of Ready to Eat Vended Food of Meat Origin with Aerobic Bacteria in Khartoum State
Arafa Mohammedeen Mohammed , Sulieman Mohammed ElSanuosi
كلية الطب البيطري-جامعة الخرطوم · السودان
This study was carried out to isolate and identify Gram- positive andGram-negative bacteria which contaminate food of meat origin.Ninety samples of cooked, ready-to-eat Sandwiches (Beef-Burger,Shawarma, Kebab and Agashi) collected from different street food venders,samples were cultured on MacConkey‘s, nutrient and blood agar. Isolates,were purified and identified to species level according to theirmorphological and biochemical properties. A total of 76 isolates wereobtained,50 of them were Gram-negative bacteria which identified:Klebsiella pneumoniae (22%), followed by Enterobacter spp (15%),Serratiamarcescens(11%),Hafnia alvei (7%),Campylobacter spp(2%), Citrobacterfreundii (2%) and Pseudomonas aeruginosa and Proteus vulgaris (1%). 26isolates were Gram-positive bacteria which identified:Staphylococcus spp(11%), Bacillus cereus(6%), Listeria monocytogenes (3%), Bacillusmycoides(2%), Brochothrix spp(2%), Kurthia gibsonii (2%), Enterococcusspp (2%) and Micrococcus spp(1%).The study revealed that foods of meat origin are often contaminated withbacteria. The presence of Klebsiella pneumoniae, Enterobacter cloacae,Campylobacter spp, Staphylococcus spp, Bacillus cereus and Listeriamonocytogeneswas of medical significance. The presence of theseOrganisms in meat foods should receive particular attention, because theirpresence indicate public Health hazard and gives a warning signal for thepossible occurrence offood borne diseases