*H. pylori* is an epsilonproteobacteria that has flagella. *H. pylori* can cause ulcers in the stomach but can also be beneficial to the human stomach microbiome. This bacterium can also adapt to the acidic environment of the stomach with several enzymes that can make it less acidic.

University of Wisconsin - Madison

Epsilonproteobacteria is a small group of proteobacteria that require minimal oxygen to survive. 

Epsilonproteobacteria

https://openstax.org/details/books/microbiology/

Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

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