stool antigen test for H. pylori
A stool antigen test for H. pylori detects the presence of the bacteria's proteins (antigens) in a stool sample, indicating a current infection. It's a non-invasive, relatively accurate method for diagnosing H. pylori infection.
How it works:
- Stool sample: A small stool sample is collected.
- Antigen detection: The test looks for specific proteins (antigens) produced by H. pylori.
- Results: A positive result indicates the presence of the bacteria.
Purpose:
- Diagnosis: Used to diagnose H. pylori infection in individuals with symptoms like stomach pain, bloating, or ulcers.
- Monitoring treatment: Can be used to confirm successful treatment after antibiotics.
Accuracy and advantages:
- Accurate: Stool antigen tests are considered to be highly accurate for diagnosing H. pylori infection.
- Non-invasive: Compared to endoscopy and biopsy, it's a less invasive method.
- Rapid: Rapid stool antigen tests can provide results in minutes.
- Cost-effective: They are generally less expensive than some other diagnostic methods.
Considerations:
- False-positive results: While generally accurate, there's a possibility of false-positive results, especially in asymptomatic individuals.
- Sample quality: Watery or very concentrated stools may not be ideal for testing.
- Post-treatment testing: For post-treatment monitoring, it's recommended to wait 4-8 weeks before testing.