Bacteroides fragilis strain Q1F2

Bacteroides fragilis strain Q1F2 is a Gram-negative, rod-shaped, anaerobic bacterium that thrives in host-associated environments. It is a chemoorganotroph, indicating that it derives energy from organic compounds, and it exists as single cells rather than in clusters or chains. This strain has three replicons and possesses two membranes, characteristic of its Gram-negative classification. With an optimal growth temperature of 37°C, Bacteroides fragilis strain Q1F2 is classified as mesophilic, showing preference for moderate temperature ranges. Although it is non-motile, the presence of flagella may play a role in its interactions within the host environment. Bacteroides fragilis strain Q1F2 is free-living and has been identified in various hosts, including Homo sapiens (humans), Gallus gallus (chickens), various Metazoa (multicellular organisms), Equidae (horses), and Serpentes (snakes). Its pathogenic potential in humans is significant; it is associated with conditions such as bacteremia, abscesses, colitis, and colorectal cancer, among others. The strain's relationship with its hosts emphasizes its dual role as a commensal organism and a pathogen. While it contributes to the normal gut microbiota, it can also lead to serious health complications, particularly when it breaches host barriers. This duality highlights the complexity of microbial interactions within host ecosystems and the potential consequences of dysbiosis.