The fecal antigen test is currently approved by the U.S. Food and Drug Administration for detection of H. pylori before and after treatment. Eighty-one patients with dyspepsia and endoscopically ...

Diagnosis of H. pylori infection can be clinical or based on noninvasive or invasive testing. In 2007, the American College of Gastroenterology published guidelines for H. pylori testing 15 (Table 2).