Bacteroides fragilis CAG:558 str. MGS:558

Bacteroides fragilis CAG:558 str. MGS:558 is a Gram-negative, rod-shaped bacterium that typically exists as single cells and demonstrates an anaerobic mode of life. This strain thrives optimally at 37.0°C, which is consistent with the physiological temperature of the human body, indicating its adaptation to host-associated environments. As a chemoorganotroph, B. fragilis CAG:558 utilizes organic compounds as its energy source, reflecting its capacity to metabolize complex carbohydrates and other organic materials found within the intestinal microbiome. This species is part of the Bacteroidetes phylum and is known for its significant presence in the gut microbiota of humans and other mammals, where it plays a crucial role in the breakdown of polysaccharides and the fermentation of dietary fibers. The anaerobic nature of B. fragilis CAG:558 suggests that it thrives in low-oxygen conditions typically found in the gastrointestinal tract, where it contributes to maintaining a balanced microbial ecosystem. Furthermore, the unique ecological role of Bacteroides fragilis CAG:558 may extend beyond mere fermentation; it could also serve as a mediator of interactions within the gut microbiome, influencing nutrient absorption and immune responses in the host. This highlights the potential importance of this strain in understanding the complex relationships between gut microbiota and host health.