Bacteroides fragilis CAG:558 str. MGS:558

Bacteroides fragilis CAG:558 str. MGS:558 is a Gram-negative, rod-shaped bacterium characterized as a strict anaerobe, thriving in host-associated environments. This organism is classified as a chemoorganotroph, meaning it derives energy from the organic compounds present in its habitat. It typically exists as single cells rather than in clusters or chains. B. fragilis CAG:558 has a mesophilic temperature range, with an optimal growth temperature of 37°C, which aligns with the typical temperature of the human body, indicating its adaptation to a host-associated lifestyle. The bacterium possesses a single chromosomal replicon and features a double membrane structure, consistent with the characteristics of Gram-negative bacteria. Mobility is absent in this strain, yet it possesses flagella, which may play a role in its life cycle or interactions within its ecological niche, although specific functions are not detailed. As a free-living organism, B. fragilis CAG:558 contributes to the complex microbial ecosystem often found in the gastrointestinal tract of humans and other animals. The presence of Bacteroides fragilis species in the gut microbiome is significant, as they are known to play critical roles in digestion, metabolism, and immune modulation. Understanding the traits of B. fragilis CAG:558 provides insight into its ecological niche and potential contributions to host health, particularly in maintaining microbial balance and influencing metabolic activities within the gut.