Shigella flexneri K-315

Shigella flexneri K-315 is a nonsporulating, Gram-negative rod-shaped bacterium that typically exists in pairs or single arrangements. This microbe is classified as a facultative anaerobe, which allows it to thrive in varying oxygen conditions, and it primarily relies on organic compounds as a chemoorganotroph for its energy source. The optimal growth temperature for S. flexneri K-315 is 37.0 °C, aligning with the typical body temperature of its host organisms, which suggests a close adaptation to a host-associated habitat. As a member of the genus Shigella, S. flexneri K-315 is known to inhabit the intestines of its hosts, where it may play a role in specific ecological interactions. The observation that this strain is nonsporulating limits its environmental resilience compared to spore-forming bacteria, indicating a reliance on host environments for survival and propagation. The facultative nature of S. flexneri K-315 allows it to switch between aerobic respiration and fermentation, facilitating its survival in diverse intestinal environments where oxygen levels can fluctuate. The ecological insight that emerges from the traits of S. flexneri K-315 is its potential role in the dynamics of gut microbiomes, where its presence may influence microbial community structure and function, especially in relation to host health and disease. This adaptability to host-associated environments underscores the importance of S. flexneri K-315 in microbiological studies focused on host-microbe interactions.