Bacteroides fragilis str. 3725 D9 ii

Bacteroides fragilis str. 3725 D9 ii is a Gram-negative, rod-shaped bacterium that is classified as a chemoorganotroph, indicating that it derives its energy from organic compounds. This organism is an anaerobe, thriving in environments devoid of oxygen, and is typically associated with host organisms, reflecting its role in the microbiome. The bacterium exhibits a single-cell arrangement and possesses two membranes, characteristic of its Gram-negative classification. Bacteroides fragilis str. 3725 D9 ii does not exhibit mobility, as it lacks flagella, which influences its ecological interactions within its habitat. The optimal growth temperature for this strain is 37°C, aligning with the mesophilic temperature range conducive to the growth of many mammalian-associated microorganisms. It has a single replicon in its genome, which can impact its genetic stability and adaptability. In terms of its ecological role, Bacteroides fragilis is recognized for its free-living lifestyle within the host-associated environments, contributing to the complex microbial community dynamics. Its presence in the gut microbiota is significant for maintaining host health, as it plays a role in digestion and immune modulation. Understanding the traits of Bacteroides fragilis str. 3725 D9 ii emphasizes the importance of anaerobic bacteria in the microbiome and their contributions to host biology.