Understanding Lab Tests for Gastritis
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Gastritis is inflammation of the stomach lining that can cause stomach pain, nausea, and digestive discomfort. While gastritis has multiple causes including medications, stress, and autoimmune conditions, one of the most common and treatable causes is infection with Helicobacter pylori (H. pylori) bacteria.
Recommended Test
H. Pylori Antigen Stool
This test detects H. pylori bacterial antigens in stool samples, providing a reliable method to diagnose active H. pylori infection causing gastritis. The test helps determine if the stomach inflammation is due to this treatable bacterial cause, allowing healthcare providers to prescribe appropriate antibiotic treatment to eliminate the infection and reduce gastritis symptoms.
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The Role of H. Pylori in Gastritis
H. pylori bacteria can colonize the stomach lining and disrupt the protective mucus layer, leading to chronic inflammation and gastritis. Identifying and treating this bacterial infection is crucial because H. pylori-related gastritis responds well to antibiotic therapy and can prevent progression to more serious complications like peptic ulcers.
Understanding Your Results
A positive H. pylori test indicates that bacteria are present and likely contributing to gastritis symptoms. Treatment typically involves a combination of antibiotics and acid-reducing medications. A negative test suggests that H. pylori is not the cause of gastritis, and other factors should be investigated by your healthcare provider.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for proper diagnosis and treatment of gastritis.
