Helicobacter heilmannii
H. heilmannii belongs to the Helicobacter family and is found in a small number of gastric biopsies. This bacterium is generally found in primates, cats, pigs, and carnivorous mammals. About 0.5% to 6% of human gastric infections have been attributed to H. heilmannii.
Pathology
mild chronic gastritis with prominent lymphoid aggregates
peptic ulceration
gastric carcinoma
mucosa-associated lymphoid tissue lymphoma (MALT lymphoma or extra-nodal marginal zone lymphoma)
References
Singhal AV, Sepulveda AR. Helicobacter heilmannii gastritis: a case study with review of literature. Am J Surg Pathol. 2005 Nov;29(11):1537-9. PMID: #16224223#