Stool test could replace endoscopy for stubborn stomach bug

This study tests a new way to treat Helicobacter pylori (H. pylori) infections that didn't get better with the first round of antibiotics. Instead of using a scope to take a stomach sample, doctors will use a stool test to find which antibiotics will work best. About 531 adults who have failed one prior treatment will get a personalized 3-drug therapy based on their stool test results. The goal is to see if this approach leads to higher cure rates with fewer side effects.