HELICOBACTER PYLORI ANTIGEN - STOOL

The Helicobacter pylori (H. pylori) Antigen – Stool Test is a non-invasive laboratory test used to detect active Helicobacter pylori infection by identifying H. pylori antigens in a stool sample. It is one of the most accurate and widely recommended tests for diagnosing active H. pylori infection and for confirming whether the infection has been successfully eradicated after treatment.

Helicobacter pylori is a spiral-shaped bacterium that infects the lining of the stomach. It is one of the leading causes of chronic gastritis, peptic ulcers, and duodenal ulcers, and is also associated with an increased risk of gastric (stomach) cancer and gastric mucosa-associated lymphoid tissue (MALT) lymphoma. Many infected individuals have no symptoms, while others may experience persistent stomach pain, bloating, nausea, frequent burping, indigestion, loss of appetite, or unexplained weight loss.

Unlike blood antibody tests, which may remain positive long after an infection has resolved, the H. pylori Stool Antigen Test detects current active infection, making it highly valuable for both initial diagnosis and post-treatment follow-up.

Doctors commonly recommend this test for individuals with symptoms of gastritis, peptic ulcer disease, chronic indigestion (dyspepsia), recurrent abdominal discomfort, unexplained nausea, or when confirming eradication after completing H. pylori treatment.

The test requires a small stool sample and uses validated immunological methods to detect H. pylori antigens with high accuracy. Results are interpreted together with the patient's symptoms, medical history, and, when necessary, endoscopy or other gastrointestinal investigations.

Benefits of the Test

• Detects active H. pylori infection.
• Non-invasive and easy to perform.
• Helps diagnose gastritis and peptic ulcer disease.
• Useful for confirming successful treatment after eradication therapy.
• More reliable than antibody testing for identifying current infection.
• Requires only a stool sample.
• High sensitivity and specificity.
• Supports early diagnosis and appropriate treatment.

Why Doctors Recommend This Test

Doctors recommend the H. pylori Stool Antigen Test for patients with persistent indigestion, upper abdominal pain, bloating, nausea, suspected peptic ulcers, or chronic gastritis. It is also recommended after treatment to confirm that the infection has been completely eradicated.

Preparation Before the Test

Proper preparation improves the accuracy of the test.

Before providing the stool sample:

• Avoid antibiotics for at least 4 weeks, unless your doctor advises otherwise.
• Avoid proton pump inhibitors (PPIs) such as omeprazole, pantoprazole, esomeprazole, or rabeprazole for about 2 weeks, if medically appropriate.
• Inform your healthcare provider about all medications you are taking.
• Collect the stool sample in a clean, dry, sterile container without contamination from urine or water.

Always follow your doctor's instructions before stopping any prescribed medication.

Normal Reporting Time

Typically: 1–2 Working Days

Reporting time may vary depending on laboratory methodology.

Who Should Take This Test?

This test is recommended for:

• Individuals with persistent stomach pain.
• Patients with chronic indigestion (dyspepsia).
• People with suspected gastritis.
• Patients with peptic or duodenal ulcers.
• Individuals with bloating and nausea.
• Patients requiring confirmation after H. pylori treatment.
• People with recurrent upper abdominal discomfort.
• Individuals referred by gastroenterologists.
• Patients with unexplained gastrointestinal symptoms.
• Anyone advised by their healthcare provider.