Texas A&M University (TAMU) BIOL206 Practice Exam 3

Helicobacter pylori is primarily found in the stomach. This bacterium is known for colonizing the gastric mucosa and is associated with various gastrointestinal conditions, such as chronic gastritis, peptic ulcers, and even gastric cancer. It survives in the highly acidic environment of the stomach by producing urease, which neutralizes gastric acid, allowing it to thrive in this hostile environment.

The other areas mentioned, such as the intestines, bloodstream, and skin, are not typical sites for H. pylori colonization or infection. The intestines are home to a different composition of gut microbiota, while H. pylori does not normally enter the bloodstream or colonize the skin. Its unique adaptation to the stomach environment distinguishes it as an important pathogen in gastrointestinal diseases.