Fermented milk products (FMPs) hold significant health benefits and cultural importance worldwide, each region having its unique recipes and traditions. A recent study delved into the microbial communities of various artisanal FMPs from different regions of Russia, including cow, camel, mare’s milk products. Notably, these products were prepared using traditional methods without commercial starter cultures, showcasing the diverse microbial ecosystems present in these products. The major volatile fatty acids (VFAs) identified in these FMPs were lactate and acetate, with variations in succinate, formate, propionate, and n-butyrate concentrations.
The analysis of bacterial communities revealed that Firmicutes (Lactococcus, Lactobacillus, Streptococcus, etc.) were predominant phyla in all FMPs, followed by Proteobacteria (Acetobacter, Klebsiella, Pseudomonas, etc.). Lactobacillus and Lactococcus were the most abundant genera in FMPs made from raw milk, while Streptococcus dominated products made from pasteurized milk and fermented at elevated temperatures. The microbial diversity of products like koumiss, shubat, ryazhenka, and others varied slightly within each type, reflecting regional specificities in production processes. Interestingly, kefir, prostokvasha, ayran, cottage cheese, and suluguni-like cheese exhibited more variability, influenced by regional factors and traditions.
The study emphasized the overall similarity of microbial communities across various FMPs, highlighting the diversity and richness of regional products. The microbial associations found in these products could potentially be utilized to develop new starters for novel products with enhanced properties. By employing advanced molecular ecological techniques like next-generation sequencing (NGS), researchers were able to uncover a vast array of bacteria involved in FMP fermentation, expanding our understanding beyond what traditional cultivation-based methods could offer.
The microbial diversity of samples like aarts, khurunga, tan, ayran, and suluguni-like cheese was explored for the first time, shedding light on the unique communities present in these lesser-studied products. The study employed rigorous sampling and DNA extraction methods to analyze more than fifty FMP samples from various regions of Russia, providing valuable insights into the complex microbial ecosystems of artisanal fermented milk products. The findings underscored the impact of regional variations, production techniques, and raw materials on shaping the microbial composition of these traditional dairy products.
Key Takeaways:
1. Artisanal fermented milk products from Russia exhibit diverse microbial communities, influenced by regional traditions and production methods.
2. Firmicutes and Proteobacteria were the predominant phyla in the analyzed FMPs, with Lactobacillus and Lactococcus being the most abundant genera.
3. Next-generation sequencing techniques have revolutionized the study of microbial diversity in fermented dairy products, revealing a wide range of bacterial species involved in fermentation processes.
4. Regional specificity plays a significant role in shaping the microbial composition of artisanal fermented milk products, highlighting the rich cultural heritage and diversity of traditional dairy products in Russia.
Tags: microbiome, quality control, yeast, microbial fermentation, bioinformatics
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