Our Helicobacter pylori Main Article provides a comprehensive look at the who, what, when and how of Helicobacter pylori

Definition of Helicobacter pylori

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Helicobacter pylori: Bacteria that cause stomach inflammation (gastritis) and ulcers in the stomach. This bacteria is the most common cause of ulcers worldwide. It is often referred to as H. pylori.

H. pylori infection is usually acquired from contaminated food and water and through person to person spread. The infection is common in crowded living conditions with poor sanitation. In countries with poor sanitation, 90% of the adult population can be infected. In the U.S., 30% of the adult population is infected.

One out of six patients with H. pylori infection develops ulcers of the duodenum or the stomach. This bacteria is also believed to be associated with stomach cancer and a rare type of lymph gland tumor called gastric MALT lymphoma.

Infected persons usually carry the infection indefinitely, unless treated with medications to eradicate the bacteria.

Suggested Reading by Our Doctors

• metronidazole, Flagyl - Explains the medication metronidazole (Flagyl) an antibiotic drug used against anaerobic bacterteria and certain parasites like giardia and ameba that can infect parts of the human body. Article includes descriptions, uses, drug interactions, and side effects.
• Endoscopy (Esophagogastroduodenoscopy, EGD) - Learn about the endoscopy procedure which examines the esophagus, stomach and duodenum to detect gastrointestinal and digestive disorders on MedicineNet.com
• Stomach Cancer - Read about stomach cancer symptoms, causes, stages, gastric cancer statistics, diagnosis, surgery, other treatment types and risk factors, like H. pylori.

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