Defining H. pylori Infection and Peptic Ulcer Disease

Helicobacter pylori (H. pylori) is a common type of bacteria that grows in the digestive tract and has a unique ability to survive in the highly acidic environment of the stomach. It’s a major cause of stomach inflammation (gastritis) and peptic ulcer disease (PUD).

PUD refers to sores (ulcers) that form in the lining of the stomach (gastric ulcers) or the upper part of the small intestine (duodenal ulcers). While other factors like long-term use of nonsteroidal anti-inflammatory drugs (NSAIDs) can also cause ulcers, H. pylori infection is responsible for the vast majority of peptic ulcers worldwide.

The bacteria damage the protective mucus layer of the stomach and duodenum, making the underlying tissue vulnerable to acid and digestive juices, leading to ulcer formation.

H. pylori Infection and Peptic Ulcer Disease Diagnosis

Diagnosing PUD often begins with a review of symptoms, which typically include burning stomach pain (often worse when the stomach is empty), bloating, nausea, or indigestion.

If a peptic ulcer is suspected, particularly in a patient with no history of NSAID use, testing for H. pylori is essential.

Several methods are used to detect the presence of the bacteria:

• Non-Invasive Tests:
  • Urea Breath Test (UBT): The patient drinks a special solution, and if H. pylori is present, it breaks down the urea in the solution, releasing carbon dioxide that is detected in the patient’s breath. This is a very reliable test. Stool Antigen Test: This test checks for H. pylori proteins (antigens) in the stool.
  • Blood Test: This test looks for antibodies to H. pylori. However, it can’t distinguish between a current and past infection, making it less useful for confirming eradication after treatment.

• Invasive Tests (Endoscopy):
  • Upper Endoscopy (EGD): A thin, flexible tube with a camera is passed down the throat to examine the esophagus, stomach, and duodenum. This allows the doctor to visually confirm the presence of an ulcer and take small biopsy samples for testing.
  • Biopsy Tests: Samples taken during endoscopy can be tested in several ways, including a Rapid Urease Test (RUT), which works similarly to the UBT but on the tissue sample, or by culturing the bacteria.

H. pylori Infection and Peptic Ulcer Disease Treatment

The primary goal of treating H. pylori-associated PUD is to eradicate the bacteria and heal the ulcer. Treatment typically involves a combination of medications for 10-14 days, often referred to as triple or quadruple therapy.

• Eradication Therapy:
  • Proton Pump Inhibitors (PPIs): Medications like omeprazole or lansoprazole reduce the amount of acid produced in the stomach, which helps ulcers heal and makes the environment less hospitable to H. pylori.Antibiotics: A combination of two to four different antibiotics (e.g., amoxicillin, clarithromycin, metronidazole, or tetracycline) is used simultaneously to overcome antibiotic resistance and effectively kill the bacteria.
  • Bismuth Subsalicylate: This agent is sometimes included, particularly in quadruple therapy, as it has antibacterial properties and helps protect the stomach lining.
• Follow-up:
  • After treatment is completed, a non-invasive test (usually UBT or stool antigen test) is recommended to confirm that the H. pylori infection has been successfully eradicated. If the bacteria persist, a different combination of antibiotics may be necessary. Successful eradication is key to preventing ulcer recurrence and reducing the long-term risk of stomach cancer.

Conclusion

H. pylori infection remains the leading cause of PUD. Effective diagnosis, relying on non-invasive tests and sometimes endoscopy, is critical for identifying the infection.

The standard treatment, a multi-drug regimen combining PPIs and antibiotics, is highly effective in eradicating the bacteria, healing ulcers, and significantly improving a patient’s long-term gastrointestinal health.

Timely diagnosis and adherence to the full course of treatment are paramount for a successful outcome.

Dr. Kailash Mishra
Director & Gastroenterologist Consultant
Prime Gastro Liver Clinic