Shigella flexneri 5a str. M90T

Shigella flexneri 5a str. M90T is a Gram-negative, non-sporulating rod-shaped bacterium that typically exists in pairs or singles and is classified as a facultative anaerobe. This strain thrives at an optimal temperature of 37.0°C, indicating its adaptation to the human body, where it is primarily host-associated. As a chemoorganotroph, S. flexneri 5a str. M90T derives energy from organic compounds, which aligns with its ecological niche within the gastrointestinal tract of its host. The facultative anaerobic nature of this microbe allows it to survive in both aerobic and anaerobic environments, enhancing its adaptability to varying conditions within the host. This metabolic versatility is particularly significant as it may facilitate the bacterium's persistence and growth in the nutrient-rich environment of the intestines, where it can compete with other microbial inhabitants. Given its specific traits and host-associated habitat, S. flexneri 5a str. M90T provides a valuable model for understanding the dynamics of microbial behavior in the human gut, especially in relation to its interactions with both host cells and other microbial species. This insight underscores the importance of studying such organisms to unravel their roles in health and disease, particularly in the context of intestinal microbiota composition and function.