Bacteroides fragilis str. B1 (UDC16-1)

Bacteroides fragilis strain B1 (UDC16-1) is a Gram-negative, rod-shaped bacterium that exists primarily as single cells. This anaerobic microbe thrives at an optimal temperature of 37.0°C, aligning with the typical physiological conditions of its host-associated habitat. As a chemoorganotroph, B. fragilis str. B1 utilizes organic compounds as its energy source, reflecting its adaptation to environments rich in organic matter, such as the gastrointestinal tract of mammals. The strain's anaerobic nature suggests a metabolic reliance on fermentation processes rather than oxidative phosphorylation, which is consistent with its ecological niche within oxygen-depleted environments. These traits collectively indicate that Bacteroides fragilis str. B1 plays a significant role in the complex microbial communities associated with mammalian hosts, possibly contributing to the breakdown of complex carbohydrates and the production of short-chain fatty acids, which are beneficial to host health. Understanding the specific adaptations of B. fragilis str. B1 within its anaerobic and host-associated environment can provide insights into its ecological role and interactions within the gut microbiome, potentially influencing both microbial diversity and host metabolism.