Which ulcer is more commonly associated with Helicobacter pylori infection?

• A. Gastric ulcer
• B. Duodenal ulcer
• C. Esophageal ulcer
• D. Stress ulcer

Answer: (B)

Duodenal ulcers are more commonly associated with Helicobacter pylori infection, which is a significant factor in the pathogenesis of these ulcers. H. pylori is a bacterium that colonizes the gastric epithelium and is known to disrupt the normal protective mechanisms of the gastrointestinal mucosa, leading to increased acid secretion and subsequent ulcer formation.

In the case of duodenal ulcers, the presence of H. pylori can result in elevated gastric acid secretion and impaired mucosal defense, promoting ulcer formation primarily in the duodenum. Studies have shown that eradication of H. pylori in patients with duodenal ulcers can lead to healing and a significant reduction in recurrence rates.

While gastric ulcers can also be associated with H. pylori, the prevalence is not as pronounced as it is with duodenal ulcers. Esophageal ulcers are typically linked to other factors such as acid reflux, and stress ulcers occur mainly in patients with significant physiological stress and are related to different mechanisms like reduced blood flow. Therefore, duodenal ulcers stand out as the ulcer type most strongly associated with H. pylori infection, highlighting the bacterium's role in gastrointestinal pathology.