Indian Journal of Pathology and Microbiology

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Year
: 2021  |  Volume : 64  |  Issue : 5  |  Page : 97--99

Helicobacter heilmannii associated gastritis: Report of a rare case


Rishila Majumder1, Pritinanda Mishra1, Subash C Samal2, Sunil J Bhat2, Susama Patra1,  
1 Department of Pathology and Lab Medicine, All India Institute of Medical Sciences, Bhubaneswar, Odisha, India
2 Department of Gastroenterology, All India Institute of Medical Sciences, Bhubaneswar, Odisha, India

Correspondence Address:
Susama Patra
Department of Pathology and Lab Medicine, AIIMS, Bhubaneswar, Odisha
India




How to cite this article:
Majumder R, Mishra P, Samal SC, Bhat SJ, Patra S. Helicobacter heilmannii associated gastritis: Report of a rare case.Indian J Pathol Microbiol 2021;64:97-99


How to cite this URL:
Majumder R, Mishra P, Samal SC, Bhat SJ, Patra S. Helicobacter heilmannii associated gastritis: Report of a rare case. Indian J Pathol Microbiol [serial online] 2021 [cited 2021 Oct 26 ];64:97-99
Available from: https://www.ijpmonline.org/text.asp?2021/64/5/97/317916


Full Text



Helicobacter pylori, is the most common bacterium causing chronic gastritis and gastroduodenal diseases in humans, with a prevalence rate of 20–50% in developed countries and up to 80% in developing countries.[1] Other bacteria from the same genus causing gastritis include Helicobacter bizzozeronii, Helicobacter felis, and Helicobacter heilmannii.[2] The incidence of H. heilmannii infection is significantly lower accounting for 1% of all Helicobacter infections among humans, but the frequency is higher in countries with poor socioeconomic status.[2] This bacterium is generally found in primates, dogs, cats and pigs, and infection in humans is acquired through a zoonotic transmission.[3] H. heilmannii, similar to H. pylori, not only causes chronic gastritis, but has also been implicated in the pathogenesis of peptic ulcer disease and neoplasms such as gastric cancer and mucosa associated lymphoid tissue (MALT) lymphoma.[4]

A 70-year-old male presented with complaints of dyspepsia, abdominal pain, and distension for 3 months. The physical examination, hematological, and biochemical tests of the patient were within normal range. In view of his clinical symptoms, upper gastrointestinal endoscopy [Figure 1] was suggested which revealed a mosaic-like pattern and nodularity in the proximal and distal body of the stomach. Biopsies were taken from proximal body. Microscopic examination showed body mucosa with focal mucin depletion and infestation of H. heilmannii in groups and singly on the surface epithelium and also within the foveolar pits. They are long, slender organism with a cork-screw appearance having 4-7 spirals [Figure 2]a,[Figure 2]b,[Figure 2]c. There were moderate atrophy of fundic glands replaced by intestinal and pseudopyloric metaplasia involving the glandular and surface epithelium without dysplasia along with prominent lymphoid follicles with germinal centers [Figure 2]d. Focal mild neutrophilic activity were also of note. However, typical lymphoepithelial lesion or any evidence of MALT lymphoma were not seen. There was no associated H. pylori infestation. Immunostain for H. pylori was positive with a terminal knob like pattern [Figure 2]e. Focal areas of metaplastic epithelium were also seen colonized by the organism which is not a feature of H. pylori [[Figure 2]e, inset]. Deeper tissue invasion by the organism was also noted [Figure 2]f and in the lumen [[Figure 2]f, inset]. Occasional intracellular positivity was also noted.{Figure 1}{Figure 2}

H. Heilmannii, was named after a German histopathologist, K. Heilmann.[5] H. Heilmannii is a spiral, gram negative bacterium measuring about 5 to 9 μm in length with four to eight tight spirals.[4],[6] About 1% of all Helicobacter infections in humans are caused by H. Heilmannii. In our institute, we have encountered only one case of H. heilamnnii out of 1214 endoscopic biopsies in the last one year in the department of Anatomical Pathology. Infection in humans occurs through zoonotic transmission and infected patients significantly report contact with animals[6] as observed in the present case, who has history of raising domestic animals. H. heilmannii infection in humans usually colonizes the gastric antrum with infestation of very few organisms,[6] commonly affecting children and causes a milder form of gastritis. In contrary to the usual clinicopathological features, our case is an elderly individual having a corpus predominant gastritis with moderate infestation of the organism. There were significant atrophy, intestinal metaplasia and lymphoid follicle formation. Focal mucin depletion was also observed in our case which is not a feature of H. heilmannii. An association between H. Heilmannii infection with gastric cancer and MALT lymphoma have been described in previous studies.[7] Though, there is no evidence of gastric carcinoma or MALT lymphoma in our case, acquisition of precursor lesion like MALT and intestinal metaplasia are seen. Immunohistochemical stain with commercially available antibodies against H. pylori highlights H. heilmannii demonstrating cross reactivity between the two organisms.[6] Other species of Helicobacter needs 16S rDNA sequencing or fluorescence in situ hybridization (FISH) with specific probes for their identification because of morphological similarity with H. heilmannii.[8] We experienced a rare case of H. heilmannii infection of stomach with morphological features of chronicity and deeper tissue invasion in an elderly individual. Because of its rarity, not much data is available to establish the role of H. heilmannii in human diseases.

Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.

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