Bacteroides fragilis strain NCTC9343

Bacteroides fragilis strain NCTC9343 is a Gram-negative, rod-shaped bacterium that exists as a free-living organism primarily associated with the human host. It is a chemoorganotroph, deriving energy from organic compounds. This strain is classified as an anaerobe, meaning it thrives in environments devoid of oxygen, a characteristic that is vital for its survival in the human gut, where oxygen levels are low. The bacterium is non-motile, indicating that it does not possess the ability to move independently. However, it does contain flagella, which are typically associated with motility in other bacterial species. NCTC9343 is mesophilic, with an optimal growth temperature of 37°C, aligning with the human body temperature, which further supports its adaptation to the human gastrointestinal environment. Bacteroides fragilis strain NCTC9343 has a complex genomic structure, with three replicons and a double membrane, which is characteristic of Gram-negative bacteria. The strain is associated with various accessions, including UFTH00000000.1, NC_003228.3, and NC_006873.1, indicating its presence in microbial databases for further study. Ecologically, Bacteroides fragilis plays a significant role in the human microbiome, contributing to gut health and influencing host immune responses. Its ability to thrive in anaerobic conditions and utilize organic matter makes it a key player in the degradation of complex carbohydrates, highlighting its importance in nutrient cycling within the human gut ecosystem.