The research on determination of the presence of Bacillus cereus in pasteurized milk

The Research on Determination of the Presence of Bacillus cereus in Pasteurized MilkIn this research, number of total mesophilic bacteria and presence of Bacillus cereus were determined on 16 different firm?s pasteurized milk with UHT system which are sold at various markets in Elazig. After milk samples were put down incubation 30°C 15 days, dilutions were prepeared by 10-2 for each sample and cultivated to PCA for total mesophilic bacteria number, to Bacillus cereus selective agar for presence of Bacillus cereus, put down the incubation 30°C 48 hour.The result of total mesophilic bacteria number (TMBN) in PCA; number of total mesophilic bacteria was determined under the detection level (<100 kob/ml) in all the milk samples. In samples; maximum TMBN was found average 29,33 kob/ml, minumum was found 0 kob/ml. TMBN was determined between 0 ? 10 in samples of 43,75%, between 10- 20 in samples of 43,75% and between 20 ? 30 in samples of 12,5%.The result of determination of Bacillus cereus in Bacillus cereus selective agar; total 52 colony which were obtained in 16 milk samples, to be subject to biochemical tests because of probably be Bacillus cereus. The result of this biochemical tests 40,38% 52 colony was identificated Bacillus cereus.Key Words: Bacillus cereus, Pasteurized Milk