津晋地区原料奶中微生物污染程度分析与鉴定-食品科学.PDF

※营养卫生 食品科学 2010, Vol. 31, No. 17 351 高文茹，陈庆森 * ，阎亚丽，庞广昌，胡志和 (天津市食品生物技术重点实验室，天津商业大学生物技术与食品科学学院，天津 300134) 沙门氏菌是一种重要的人畜共患肠道疾病致病菌，它引起的食物中毒已成为一类最常见且危害性较大的细 菌性食物中毒。本研究对我国津晋地区原料奶中微生物污染情况进行分析与鉴定，主要包括菌落总数、大肠菌群和 4 7 沙门氏菌的检测。结果显示：津晋地区原料奶来源不同，奶源质量有较大差别。菌落总数平均在 10 ～10 CFU/mL 之间，存在许多超标奶；大肠菌群数差别较大，晋奶源质量很好，大肠菌群数均低于 110MPN/mL ，天津地区 乳品厂A 大肠菌群数最高为 1100MPN/mL，乳品厂B 受到大肠菌群的严重污染，几乎均大于或等于 11000MPN/mL； 沙门氏菌未检出。研究证实了津晋地区原料奶的质量和安全性不容忽视。 原料奶；微生物；菌落总数；大肠菌群；沙门氏菌；污染 Analysis and Identification on Contamination Status of Raw Milk in Tianjin and Shanxi Regions GAO Wen-ru ，CHEN Qing-sen* ，YAN Ya-li ，PANG Guang-chang ，HU Zhi-he (Tianjin Key Laboratory of Food Biotechnology, College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China) Abstract ：Salmonella is one of the most important gastrointestinal pathogens for human and animals. Approximately 70% － 80% of bacterial food poisoning cases are caused by Salmonella in China. Therefore, food poisoning caused by Salmonella has become one of the most common and comparatively pernicious bacterial species. The contamination in raw milk from Tianjin and Shanxi regions in China was investigated by determining total bacterial count and coliform bacteria and Salmonella bacteria. The results indicated that the quality of raw milk from different sources in the two regions exhibited a great difference. The 4 7 average total bacterial counts varied from 10 CFU/mL to 10 CFU/mL. Most of the tested samples could meet the quality standard and few of them were unqualif