Helicobacter bilis ATCC 43879

*Helicobacter bilis ATCC 43879* is a Gram-negative, spiral-shaped bacterium that thrives at mesophilic temperatures, categorizing it as a mesophilic microbe. It is a chemoheterotroph, deriving its energy from the consumption of organic compounds, and has been identified as a microaerophile, requiring lower levels of oxygen for optimal growth compared to atmospheric levels. This organism is primarily associated with the gastrointestinal tract of various mammals, particularly rodents, where it can inhabit both the stomach and intestines. Its spiral shape and flagella facilitate mobility in the viscous environment of the gut, allowing it to effectively colonize and establish itself within the host's mucosal lining. As a chemoheterotroph, *H. bilis* utilizes host-derived organic substrates, which it metabolizes for energy and growth, potentially influencing the host's digestive processes and microbiome composition. The microaerophilic nature of *H. bilis* means that it thrives in environments with reduced oxygen tension, characteristic of the gastrointestinal tract, where oxygen availability is limited due to the dense microbial community. This adaptation not only aids in its survival but also can impact the oxygen levels and metabolic activities of other gut microbiota. *Helicobacter bilis* has been studied for its role in gastrointestinal diseases, including its potential involvement in conditions such as gastritis and enteritis. Unlike its cousin, *Helicobacter pylori*, which is widely known for causing gastric ulcers and cancer in humans, *H. bilis* demonstrates unique pathogenicity in certain animal models. There is ongoing research to explore its interactions within the gut microbiome, which may lead to insights into microbial ecology and potential therapeutic strategies for gut-related diseases. Additionally, its relationship with its host's immune response presents a fascinating area for further study, particularly in understanding how microbial communities affect health and disease.