Habitat and Morphology of Helicobacter pylori

Habitat of Helicobacter pylori

1. The natural habitat of H. pylori species is gastrointestinal tract of mammals and birds.
2. H. pylori was first identified in human intestinal biopsies in 1983.
3. They inhabit the surface of stomach mucosa.
4. Majority of H. pylori are located adjacent to surface and pit gastric epithelial cells.
5. H. pylori doesn’t colonise on the area of intestinal metaplasia of the stomach.
6. These has been isolated from rectal swabs and faeces.
7.  There are several enteric helicobacters inhabiting the lower gastrointestinal tract of man ( small intestine, colon, rectum, hepatobiliary tract).

Morphology of Helicobacter pylori
1. They are gram negative, spiral shaped or curved rods 2. They are 0.5 – 0.9 um wide by 2 – 4 um long with one to three turns when observed in vivo. 3. They are highly motile with one to four unipolar sheahted flagella. 4. Each flagellum is approx. 30 um long and 2.5 um thick. 5. No spores are formed in blood agar culture. 6. After prolonged culture on solid or in liquid medium, coccoid forms are formed.
Helicobacter pylori in stomach
                                              Helicobacter pylori in stomach

Gram Stain of Helicobacter pylori
                                      Gram Stain of Helicobacter pylori ( Gram Negative )

Habitat and Morphology of Helicobacter pylori


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