<unk>  refers to a group of bacterial species within the Helicobacter genus. The Helicobacter genus consists of at least 40 species of spiral-shaped (also described as corkscrew-shaped) flagellated, Gram-negative bacteria of which the by far most prominent and well-known species is Helicobacter pylori (H. pylori). H. pylori is associated with the development of gastrointestinal tract diseases such as stomach inflammation, stomach ulcers, duodenal ulcers, stomach cancers that are not lymphomas, and various subtypes of extranodal marginal zone lymphomass, e.g. those of the stomach, small intestines, large intestines, and rectumn. H. pylori has also been associated with the development of bile duct cancer and has been associated with a wide range of other diseases although its role in the development of many of these other diseases requires further study. The H. heilmannii<unk> <unk>  species of bacteria take as part of their definition a similarity to H. pylori in being associated with the development of stomach inflammation, stomach ulcers, duodenal ulcers, stomach cancers that are not lymphomas, and extranodal marginal B cell lymphomas of the stomach. It is important to recognize and diagnose the association of H. heilmannii<unk> <unk>  with these upper gastrointestinal tract diseases, particularly extranodal marginal zone lymphoma of the stomach, because many of them have been successfully treated using antibiotic-based drug regimens directed against the instigating H. heilmannii<unk> <unk>  bacterial species.
Helicobacter heilmannii sensu lato
Bacillus cereus biovar anthracis
Helicobacter heilmannii s.s
Helicobacter bizzozeronii
Bartonella rochalimae
Bacteroides dorei
Bacteroides caccae
Helicobacter suis