Suárez B, Ferreirós C M
Centro de Investigaciones Agrarias de Mabegondo, La Coruña, Spain.
J Dairy Res. 1991 Feb;58(1):127-36. doi: 10.1017/s0022029900033574.
The psychrotrophic bacterial flora of milk was examined after aseptic hand milking. A total of 409 strains were tentatively characterized and classified into 17 groups by a reduced set of tests and cluster analysis. Lipolytic organisms (53.7% exceeded proteolytic organisms (29.6%), and a reported predominance of oxidase-positive organisms (54.5%) was not found. Gram-negatives were mainly Enterobacteriaceae, Flavobacterium, Acinetobacter and Pseudomonas. In the Gram-positive groups Micrococcaceae were the most abundant (44.4%) followed by coryneforms (16.3%). Only two of seven commonly used disinfectants acted differently with Gram-positive and Gram-negative organisms (P less than 0.01), although in general Gram-positives were more resistant than Gram-negatives.
对手挤无菌牛奶中的嗜冷细菌菌群进行了检测。通过一组简化的试验和聚类分析，初步鉴定了总共409株细菌，并将其分为17组。产脂解酶的微生物（53.7%）多于产蛋白酶的微生物（29.6%），且未发现有报道称占优势的氧化酶阳性微生物（54.5%）。革兰氏阴性菌主要是肠杆菌科、黄杆菌属、不动杆菌属和假单胞菌属。在革兰氏阳性菌群中，微球菌科最为丰富（44.4%），其次是棒状杆菌（16.3%）。七种常用消毒剂中只有两种对革兰氏阳性菌和革兰氏阴性菌的作用不同（P小于0.01），不过总体而言革兰氏阳性菌比革兰氏阴性菌更具抗性。
