食物链微生物学.肠杆菌科检测和计数的水平法.第1部分:肠杆菌检测

[中文适用范围]： 本文件规定了一种用于检测肠杆菌科细菌的富集方法。 它适用于 — 用于人类消费和饲养动物的产品，以及 — 初级生产、食品生产和食品处理领域的环境样品。 该方法适用于 — 当所寻找的微生物预计需要通过富集来复苏时，以及 — 当所寻找的微生物数量预计低于每毫升或每克测试样品 100 个时。 该方法对很大程度的可变性的敏感性强加了本文件的适用性限制（参见第 11 条）。 注：可通过在液体培养基中孵育后计算最可能数（MPN）来进行计数。 参见附录 A。 [外文原描述]： ISO 21528-1:2017 specifies a method, with enrichment, for the detection of Enterobacteriaceae . It is applicable to - products intended for human consumption and the feeding of animals, and - environmental samples in the area of primary production, food production and food handling. This method is applicable - when the microorganisms sought are expected to need resuscitation by enrichment, and - when the number sought is expected to be below 100 per millilitre or per gram of test sample. A limitation on the applicability of ISO 21528-1:2017 is imposed by the susceptibility of the method to a large degree of variability (see Clause 11). NOTE Enumeration can be carried out by calculation of the most probable number (MPN) after incubation in liquid medium. See Annex A.