英国蓝纹生牛乳奶酪的微生物群落动态。

Microbial community dynamics of a blue-veined raw milk cheese from the United Kingdom.

机构信息

Division of Food Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, United Kingdom; Department of Agricultural Product Technology, Faculty of Agriculture, Syiah Kuala University, Darussalam, Banda Aceh 23111, Indonesia.

Division of Food Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, United Kingdom.

出版信息

J Dairy Sci. 2018 Jun;101(6):4923-4935. doi: 10.3168/jds.2017-14104. Epub 2018 Mar 15.

Abstract

A commercial blue-veined cheese made from unpasteurized milk was examined by conventional culturing and PCR denaturing gradient gel electrophoresis analysis of the bacterial community 16S rRNA genes using 3 primer sets, V3, V4V5, and V6V8. Genomic DNA for amplification was extracted directly from raw milk, starter culture, cheese at different stages of production, fully ripened cheese, and from the cultured cells grown on various media. The outer rind was sampled separately from the inner white core and blue veins. A diverse microbiota containing Lactococcus lactis ssp. lactis, Lactobacillus plantarum, Lactobacillus curvatus, Staphylococcus gallinarum, Staphylococcus devriesei, Microbacterium sp., Sphingobacterium sp., Mycetocola sp., Brevundimonas sp., Enterococcus faecalis, Proteus sp., and Kocuria sp. was detected in the raw milk using culturing methods, but only Lactococcus lactis ssp. lactis, Lactobacillus plantarum, and Enterococcus faecalis survived to the final cheese and were detected both in the core and the rind. Using PCR denaturing gradient gel electrophoresis analysis of the cheese process samples, Staphylococcus equorum and Enterococcus durans were found in the rind of prepiercing samples but not in the core and veins; after piercing, these species were found in all parts of the cheese but survived only in the rind when the cheese was fully ripened. Brevibacterium sp., Halomonas sp., Acinetobacter sp., Alkalibacterium sp., and Corynebacterium casei were identified only by PCR denaturing gradient gel electrophoresis and not cultured from the samples. Brevibacterium sp. was initially identified in the cheese postpiercing (core and veins), Halomonas sp. was found in the matured cheese (rind), and Acinetobacter sp., Alkalibacterium sp., and Corynebacterium casei were also found in the prepiercing samples (rind) and then found through the subsequent process stages. The work suggests that in this raw milk cheese, a limited community from the milk survive to the final cheese, with salt addition and handling contributing to the final cheese consortium.

摘要

一种由未经巴氏消毒的牛奶制成的商业蓝纹奶酪,使用 3 个引物组(V3、V4V5 和 V6V8)对细菌群落 16S rRNA 基因进行常规培养和 PCR 变性梯度凝胶电泳分析。用于扩增的基因组 DNA直接从原料奶、发酵剂、不同生产阶段的奶酪、完全成熟的奶酪以及在各种培养基上生长的培养细胞中提取。外皮从内部白色核心和蓝色静脉中单独取样。使用培养方法在原料奶中检测到含有乳球菌乳亚种、植物乳杆菌、弯曲乳杆菌、鸡葡萄球菌、德雷氏葡萄球菌、微杆菌属、鞘氨醇杆菌属、分枝杆菌属、短小芽孢杆菌属、粪肠球菌、变形杆菌属和节杆菌属的多样微生物群,但只有乳球菌乳亚种、植物乳杆菌和粪肠球菌存活到最终奶酪中,并在核心和外皮中均有检测到。使用 PCR 变性梯度凝胶电泳分析奶酪工艺样品,发现预穿孔样品的外皮中有马胃葡萄球菌和耐久肠球菌,但在核心和静脉中没有;穿孔后,这些物种在奶酪的所有部分中均有发现,但在奶酪完全成熟时仅在皮中存活。短杆菌属、盐单胞菌属、不动杆菌属、耐碱杆菌属和乳酪棒状杆菌仅通过 PCR 变性梯度凝胶电泳鉴定,而无法从样品中培养出来。短杆菌属最初在奶酪穿孔后(核心和静脉)中被鉴定出来,盐单胞菌属在成熟奶酪(外皮)中被发现,不动杆菌属、耐碱杆菌属和乳酪棒状杆菌也在预穿孔样品(外皮)中被发现,然后在随后的工艺阶段中被发现。这项工作表明,在这种生牛乳奶酪中,只有来自牛奶的有限群落能够存活到最终奶酪中,盐的添加和处理有助于形成最终奶酪联合体。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索