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Related Concept Videos

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

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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 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 I: Introduction01:30

Peptic Ulcer Disease I: Introduction

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Peptic Ulcer Disease (PUD) is characterized by mucosal excavation in the esophagus, stomach, pylorus, or duodenum. It can manifest as acute or chronic based on the extent and duration of mucosal involvement.
An acute ulcer, marked by superficial erosion and minimal inflammation, swiftly resolves upon identifying and addressing the underlying cause. In contrast, a chronic ulcer persists, potentially eroding through the muscular wall and forming fibrous tissue.
Peptic ulcers can also be...
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Peptic Ulcer Disease I: Introduction01:25

Peptic Ulcer Disease I: Introduction

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Peptic ulcer disease (PUD) involves breaks in the gastrointestinal tract's mucosal lining, primarily in the stomach and duodenum, with less frequent occurrences in the lower esophagus or near the pylorus.Ulcers can be acute or chronic. Acute ulcers are short-lived with minimal inflammation and heal quickly after the irritant is removed. Chronic ulcers persist, may recur, and often cause scarring due to ongoing tissue damage. Superficial erosions affect only the mucosal layer and are called...
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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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Retinal and Choroidal Thickness Changes in Populations with Helicobacter pylori Infection by Swept-Source Optical Coherence Tomography
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The relation between Helicobacter pylori and ulcerative colitis.

Sedat Caner, Akif Altinbaş, Yusuf Yeşıl

    Turkish Journal of Medical Sciences
    |December 26, 2014
    PubMed
    Summary

    Helicobacter pylori (H. pylori) was found in over half of ulcerative colitis (UC) patients. However, H. pylori rates were lower in severe UC cases, suggesting a link between disease extent and bacterial presence.

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    Area of Science:

    • Gastroenterology
    • Microbiology
    • Immunology

    Background:

    • Ulcerative colitis (UC) pathogenesis involves genetic and bacterial factors.
    • Conflicting data exists regarding the association between Helicobacter pylori (H. pylori) and UC.
    • Investigating H. pylori prevalence in UC patients is crucial.

    Purpose of the Study:

    • To determine the rate of H. pylori infection in patients diagnosed with ulcerative colitis.
    • To explore the relationship between H. pylori presence and UC extent.

    Main Methods:

    • Histopathological examination of stomach biopsies from 49 UC patients undergoing endoscopy.
    • Assessment of H. pylori presence in the stomach.

    Main Results:

    • H. pylori positivity was observed in 57.1% of UC patients.
    • A significantly lower H. pylori positivity rate (11.1%) was noted in patients with pancolitis (extensive UC) compared to limited disease.
    • No correlation was found between H. pylori positivity and UC severity or medication use.

    Conclusions:

    • The extent of UC appears to influence H. pylori positivity rates.
    • Further research is needed to ascertain if immunosuppressive drugs or UC itself contributes to lower H. pylori prevalence in extensive disease.