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Metagenomics reveals differences in spore-forming bacterial diversity in raw milk in different regions and seasons in China

文献类型： 外文期刊

作者： Li, Ning 1 ; Xu, Wenjun 1 ; Meng, Lu 1 ; Zhao, Yankun 2 ; Zhao, Xiaowei 1 ; Zheng, Nan 1 ; Zhang, Yangdong 1 ; Wang, Jiaqi 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Anim Sci, State Key Lab Anim Nutr & Feeding, Beijing 100193, Peoples R China

2.Chinese Acad Agr Sci, Inst Anim Sci, Key Lab Qual & Safety Control Milk & Dairy Prod, Minist Agr & Rural Affairs, Beijing 100193, Peoples R China

3.Chinese Acad Agr Sci, Inst Anim Sci, Lab Qual & Safety Risk Assessment Dairy Prod, Minist Agr & Rural Affairs, Beijing 100193, Peoples R China

4.Anhui Acad Agr Sci, Inst Anim Husb & Vet Med, Hefei 230031, Peoples R China

5.Xinjiang Acad Agr Sci, Inst Qual Stand & Testing Technol Agroprod, Urumqi 830091, Peoples R China

关键词： Raw milk; Spore-forming bacteria; Metagenomic sequencing; Season; Region

期刊名称：FOOD RESEARCH INTERNATIONAL （ 影响因子：8.0； 五年影响因子：8.5 ）

ISSN： 0963-9969

年卷期： 2024 年 198 卷

页码：

收录情况： SCI

摘要： The spore-forming bacteria in the dairy industry are notable for their spores resilience and capacity to survive heating processes, allowing them to germinate and enter the vegetative stage, potentially leading to spoilage of the milk. Additionally, these spores can form biofilms, becoming a persistent source of contamination in processing environments. In this study, we collected a total of 165 raw milk from six different parts in China in spring, summer, autumn, and winter, respectively. Metagenomics sequencing method was used to explore and compare the differences in spore-forming bacterial composition and diversity in raw milk samples. Among these samples, four genera and 207 species of spore-forming bacteria were identified, with the genus Bacillus and the species Paenibacillus darwinianus dominant. Seasonal variations had a greater impact on the composition and abundance of spore-forming bacteria in raw milk than regional differences. Notable, raw milk samples collected during the spring and summer exhibited a higher number of unique spore-forming bacterial species compared to those collected in other seasons. Moreover, different regions and seasons have their own dominant bacteria. Metabolism of cofactors and vitamins, energy metabolism, carbohydrate metabolism, and amino acid metabolism were the main metabolic pathways. Hence, specific strategies need to be adopted to prevent and control spore-forming bacteria in raw milk in different regions and seasons.

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