Adaptation of Bacillus species to dairy associated environment facilitates their biofilm forming ability

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Abstract

Biofilm-forming Bacillus species are often involved in contamination of dairy products and therefore present a major microbiological challenge in the field of food quality and safety. In this study, we sequenced and analyzed the genomes of milk- and non-milk-derived Bacillus strains, and evaluated their biofilm-formation potential in milk. Unlike non-dairy Bacillus isolates, the dairy-associated Bacillus strains were characterized by formation of robust submerged and air–liquid interface biofilm (pellicle) during growth in milk. Moreover, genome comparison analysis revealed notable differences in putative biofilm-associated determinants between the dairy and non-dairy Bacillus isolates, which correlated with biofilm phenotype. These results suggest that biofilm formation by Bacillus species might represent a presumable adaptation strategy to the dairy environment.

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Ostrov, I., Sela, N., Belausov, E., Steinberg, D., & Shemesh, M. (2019). Adaptation of Bacillus species to dairy associated environment facilitates their biofilm forming ability. Food Microbiology, 82, 316–324. https://doi.org/10.1016/j.fm.2019.02.015

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