Isolasi Salmonella Spp. Pada Sampel Daging Sapi Di Wilayah Bogor Serta Uji Ketahanannya Terhadap Proses Pendinginan Dan Pembekuan

Abstract

Nowadays people must be aware to their choose of food, due to many case affected by salmonella contamination. This research focusing on level of salmonella contamination in beef samples and its survival ability at frozen (-16°C) and refrigeration (6°C) temperature. Beef samples (ground and cut) was collected from 5 traditional market and 10 modern market in Bogor area. The contamination level was determined by aerobic plate count method and conventional isolation of Salmonella spp. The average of aerobic plate count from traditional market was 7.49 ± 0.49 log CFU/g and from modern market was 6.09 ± 0.85 log CFU/g. Meanwhile, the isolation level of Salmonella spp. with API 20E from total 30 samples reach 16.67%. One sample was indicated 99.9% (excellent identification) of Salmonella spp. while the other 4 samples was indicated 89.4% (excellent identification). Salmonella spp. in beef samples kept at -16°C and 6°C show that it was good to survive in both temperature, no matter first inoculum in 3 log CFU/g or 6 log CFU/g. Its survival ability can be seen from insignificant change of total Salmonella spp. counted (p>0,05).