Bacteroides fragilis

Bacteroides fragilis is a Gram-negative, rod-shaped bacterium characterized by its non-motile nature and arrangement as single cells. This organism thrives in anaerobic environments, demonstrating its adaptation as a chemoorganotroph that derives energy from organic compounds. Optimal growth occurs at 37°C, classifying it as mesophilic. B. fragilis possesses two cellular membranes, a trait typical of Gram-negative bacteria, and contains two replicons in its genome, accessible through the genome accessions QRZH00000000.1 and QRKP00000000.1. B. fragilis is primarily associated with host organisms, where it exists as a free-living microbe. It is known to have pathogenic potential in humans, although specific pathogenic mechanisms are not detailed within the provided traits. This bacterium plays a significant role in the human gut microbiota, contributing to various metabolic processes and maintaining gut health. Its ability to thrive in anaerobic conditions and its nutritional versatility underscore its ecological significance within host-associated environments.