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Related Concept Videos

Gastritis II: Pathophysiology01:26

Gastritis II: Pathophysiology

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The pathophysiology of gastritis begins with the colonization of the stomach lining by Helicobacter pylori (H. pylori). This bacterium spreads mainly via the oral-oral route through saliva or shared utensils, and can also be transmitted in overcrowded or unhygienic environments through contaminated water, despite its brief survival outside the body.ColonizationOnce ingested, H. pylori enters the stomach and begins colonization by navigating through the mucus layer lining the stomach wall. It...
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Treating Helicobacter pylori in Peptic Ulcers: Antimicrobial Therapy01:16

Treating Helicobacter pylori in Peptic Ulcers: Antimicrobial Therapy

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Helicobacter pylori, a resilient gram-negative bacterium, can thrive in the stomach's harsh, acidic environment. Infection with H. pylori leads to a cascade of events within the stomach lining. One of the critical disruptions caused by this bacterium is the interference with somatostatin production, a hormone responsible for regulating acid secretion. This interference tips the balance, escalating acid secretion and diminishing bicarbonate levels. This imbalance compromises the defensive...
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Peptic Ulcer01:27

Peptic Ulcer

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Peptic ulcers are erosive lesions of the gastric or duodenal lining, most commonly caused by Helicobacter pylori infection. This Gram-negative, helical bacterium has adapted to survive the stomach’s acidic environment by producing urease, which converts urea into ammonia and carbon dioxide. The ammonia neutralizes gastric acid in the bacterium’s immediate environment, allowing colonization of the gastric mucosa. H. pylori attaches to mucus-secreting epithelial cells, penetrates the...
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Peptic Ulcer Disease II: Pathophysiology01:24

Peptic Ulcer Disease II: Pathophysiology

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Peptic ulcer disease develops when protective mechanisms of the gastrointestinal mucosa are overwhelmed by harmful factors, leading to localized erosions in the stomach or proximal duodenum. The main causes are Helicobacter pylori infection and chronic use of nonsteroidal anti-inflammatory drugs (NSAIDs).Helicobacter pylori–Induced InjuryBacterial Adaptation and Colonization:H. pylori is a spiral, Gram-negative bacterium adapted to the acidic stomach. and transmitted through oral-oral or...
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Peptic Ulcer Disease II: Pathophysiology01:28

Peptic Ulcer Disease II: Pathophysiology

3.0K
Peptic Ulcer Disease (PUD) is characterized by the development of ulcers in the stomach or duodenal mucosa. Its pathophysiology is complex, involving a balance between damaging and protective elements.
Damaging agents such as Helicobacter pylori, gastric acid, pepsin, and nonsteroidal anti-inflammatory drugs (NSAIDs) can weaken the mucosal defense, allowing hydrogen ions to infiltrate back and harm epithelial cells.
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Peptic Ulcer Disease III: Clinical Manifestations and Diagnostic Studies01:28

Peptic Ulcer Disease III: Clinical Manifestations and Diagnostic Studies

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Peptic ulcer disease (PUD) presents with diverse symptoms depending on the location and severity of the ulcer. Clinical manifestations of peptic ulcer include dull pain and a burning sensation in the mid-epigastric region.
Few clinical manifestations differentiate gastric ulcers from duodenal ulcers. Distinctions in the location, timing, and pain relief are crucial for healthcare providers in differentiating between gastric and duodenal ulcers during clinical assessments.
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Related Experiment Video

Updated: May 3, 2026

Gastric Mucosa Quantitative Polymerase Chain Reaction Analysis for Detecting Helicobacter pylori and Antibiotic Resistance
05:23

Gastric Mucosa Quantitative Polymerase Chain Reaction Analysis for Detecting Helicobacter pylori and Antibiotic Resistance

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Helicobacter pylori indyspeptic Nigerians.

A B Olokoba1, E Apari, F K Salawu

  • 1Gastroenterology Unit, Department of Medicine, University of Ilorin Teaching Hospital, P.M.B 1459, Ilorin, Kwara State, Nigeria.

West African Journal of Medicine
|February 4, 2014
PubMed
Summary

Helicobacter pylori infection is highly prevalent in dyspeptic patients in North-Eastern Nigeria, significantly associated with severe chronic gastritis. This finding highlights the importance of H. pylori detection in this population.

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Area of Science:

  • Gastroenterology
  • Microbiology
  • Pathology

Background:

  • Dyspepsia is a frequent gastrointestinal disorder and a primary reason for upper gastrointestinal endoscopy.
  • Helicobacter pylori (H. pylori) is a key factor in acid peptic diseases and gastric cancer.
  • H. pylori detection during endoscopy is standard, yet data from North-Eastern Nigeria is limited.

Purpose of the Study:

  • To ascertain the prevalence of H. pylori in dyspeptic patients.
  • To investigate the correlation between H. pylori infection and the severity of chronic gastritis.

Main Methods:

  • A hospital-based cross-sectional study was conducted from November 2006 to May 2010.
  • Endoscopic biopsies from the antral stomach of dyspeptic patients were collected.
  • Biopsies were processed for H. pylori detection and histological analysis.

Main Results:

  • 349 dyspeptic patients (43.6% male, 56.4% female) underwent endoscopy.
  • The prevalence of H. pylori was found to be 56.7%.
  • H. pylori infection showed a strong association with severe chronic gastritis (80.3%), moderate (57.5%), and mild (20%) activity.

Conclusions:

  • A high prevalence of H. pylori exists among dyspeptic individuals in the study region.
  • There is a significant association between H. pylori and chronic gastritis, particularly with severe inflammatory activity.