The acid pH in the gastric mucosa is probably one characteristic that makes this niche inaccessible to bacteria other than Helicobacter pylori. The bacterium must be well adapted to grow under acidic conditions and must employ specialized acid protective mechanisms. The ability to survive under these low pH conditions and the chemotactic properties enables H. pylori to colonize the stomach. Some aspect about acid survival mechanism in H. pylori and its chemotactic properties are discussed.
Valenzuela V, M. ., Cerda A , O. ., & Toledo A, PhD, H. . (2003). La quimiotaxis y la adaptación al medio ácido asisten a Helicobacter pylori en la colonización del estómago. Revista Hospital Clínico Universidad De Chile, 14(2), pp. 126–31. https://doi.org/10.5354/2735-7996.2003.79389
