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An electron microscopic study of Helicobacter pylori in the surface mucous gel layer

M Ogata1, K Araki, T Ogata

  • 1Department of Surgery, Kochi Medical School, Japan.

Histology and Histopathology
|May 20, 1998
PubMed

Insights

Helicobacter pylori, including coccoid forms, distributes throughout the gastric mucosa's mucous gel layer. Bacterial filaments may link H. pylori to mucus cells, suggesting a novel interaction mechanism.

Area of Science:

  • Microbiology
  • Gastroenterology
  • Pathogen-Host Interaction

Background:

  • Helicobacter pylori is a significant human pathogen.
  • Understanding H. pylori's distribution in the gastric environment is crucial for infection control.
  • The role of different bacterial morphologies and their interaction with host tissues requires further investigation.

Purpose of the Study:

  • To investigate the distribution of spiral and coccoid Helicobacter pylori forms within the human gastric mucosa's surface mucous gel layer (SMGL).
  • To examine the glycocalyx of H. pylori using lectin labeling to understand bacterial-mucus interactions.
  • To characterize the physical associations between H. pylori and the gastric SMGL.

Main Methods:

  • Analysis of gastric mucosae from 14 human gastric cancer patients infected with H. pylori.
  • Microscopic examination of H. pylori distribution within the SMGL (50-100 microns thickness).
  • Lectin labeling of the bacterial glycocalyx for spiral and coccoid forms to assess carbohydrate presence and binding patterns.

Main Results:

  • H. pylori, both spiral and coccoid forms (78.6% prevalence of coccoid), were found throughout the entire thickness of the SMGL.
  • Vacuole-like clear areas were observed near H. pylori within the mucus.
  • Bacterial fibrillae-like filaments radiated from H. pylori, potentially linking bacteria to mucus cells, but lacked specific lectin staining, indicating minimal sugar molecules on these structures.

Conclusions:

  • Helicobacter pylori colonizes the entire thickness of the gastric surface mucous gel layer.
  • The coccoid form of H. pylori is prevalent in infected gastric mucosa.
  • Fibrillae-like filaments on H. pylori may mediate adherence to gastric mucus, independent of specific sugar residues.

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