Bacteroides caccae strain AM16-49B

Bacteroides caccae strain AM16-49B is a Gram-negative, rod-shaped anaerobic bacterium primarily found in the gastrointestinal tract of humans (Homo sapiens). This species is characterized by the presence of flagella, which may facilitate its movement within the gut environment. Bacteroides caccae is nonsporulating and possesses a single replicon. Although commonly part of the gut microbiota, Bacteroides caccae has been associated with health complications, specifically bacteremia and anaerobic bloodstream infections. These pathogenic effects highlight its potential role in human health, particularly in immunocompromised individuals or under conditions that disrupt normal gut flora balance. The ability of Bacteroides caccae to thrive in the anaerobic conditions of the gut underscores its adaptation to this specific habitat, where it contributes to the complex microbial community. Its presence in the bloodstream as a pathogenic organism indicates that while it plays a role in normal gut function, it can also transition to a harmful state under certain circumstances. Understanding the dual role of Bacteroides caccae—as both a commensal organism and a potential pathogen—provides insights into the intricate relationships within the gut microbiome and their impact on human health. The ability of some gut bacteria to cause infections when they enter sterile sites in the body emphasizes the importance of maintaining a balanced microbiota to prevent opportunistic infections.