1994年8月,我们对张家口市部分集体,个体冷饮制作及销售个体摊点采集100份冷饮食进行大肠杆菌检测,对其中76份阳性株时进行生化分类,并对其污染因素时行分析。 1 资料来源及方法 样品来源:①对冷饮食品制作单位5家的成品冷饮产品采集50份,其中雪糕10份,冰袋20份,汽水20份;②随机抽取5家个体销 August 1994, we Zhangjiakou City, part of the collective, individual cold drinks production and sales of individual stalls collected 100 cold diet for E. coli detection, of which 76 positive strains when biochemical classification, and analysis of its pollution factors. 1 Sources of data and methods Sample sources: ① 50 samples of finished cold drink products from 5 manufacturers of cold food and food production units were collected, including 10 ice creams, 20 ice packs and 20 soft drinks; ② Five randomly selected individual