Which testing method can identify H.pylori infection?

Stool antigen testing is a non-invasive and effective method used to identify Helicobacter pylori (H. pylori) infection. This test works by detecting specific antigens present in the stool that are produced by the H. pylori bacteria. It is particularly useful because it can be performed easily and does not require invasive procedures.

Patients can provide a stool sample in a convenient setting, and the test results can help confirm an active infection. This method is also favored for post-treatment follow-up to determine if eradication of the bacteria has been successful.

In contrast, blood culture is not typically used for diagnosing H. pylori. Endoscopic biopsy, while it can detect H. pylori, involves more invasive procedures and is primarily used in cases where there is suspicion of complications or the need to examine the gastric mucosa. Saliva testing is not a recognized method for diagnosing H. pylori, as the bacteria are localized in the stomach and are not typically found in saliva. Thus, stool antigen testing stands out as the most appropriate and commonly used method for identifying H. pylori infections.