标准摘要
[中文适用范围]： 本文件规定了一种在 37°C 厌氧条件下使用菌落计数技术对乳制品中的双歧杆菌进行选择性计数的方法。该方法适用于乳制品，例如发酵乳（如酸奶）和非发酵乳（如巴氏杀菌乳、脱脂乳、乳清蛋白浓缩物）、奶粉和配方奶粉（如婴儿配方奶粉、较大婴儿的后续配方奶粉、幼儿产品），其中这些微生物存在且可存活，与其他乳酸菌结合或单独存在。该方法也适用于发酵剂和益生菌培养物。有关乳制品的拟议质量标准，请参见 CXS 243-2003。乳制品中使用的双歧杆菌通常属于以下种（例如参考文献 [7] 和 [10]）： - 青春双歧杆菌； - 动物双歧杆菌动物亚种； - 动物双歧杆菌乳亚种； — B. 双歧杆菌； — B. 短； — B. longum subsp.婴儿; — B. longum subsp.长。 [外文原描述]： This document specifies a method for the selective enumeration of bifidobacteria in milk products by using a colony-count technique at 37 °C under anaerobic conditions. The method is applicable to milk products, such as fermented (e.g. yoghurts) and non-fermented milks (e.g. pasteurized milks, skim milks, whey protein concentrates), milk powders and formulae (e.g. infant formulae, follow-up formulae for older infants, products for young children) where these microorganisms are present and viable, in combination with other lactic acid bacteria or alone. The method is also applicable to starter and probiotic cultures. For proposed quality criteria of dairy products, see, for example, CXS 243-2003. Bifidobacteria used in milk products usually belong to the following species (e.g. References [7] and [10]): — Bifidobacterium adolescentis ; — B. animalis subsp. animalis ; — B. animalis subsp. lactis ; — B. bifidum ; — B. breve ; — B. longum subsp. infantis ; — B. longum subsp. longum .
英文名称Milk products — Enumeration of bifidobacteria — Colony-count technique