“Stool that is black, foul-smelling, and increased in frequency may result from a bleeding ulcer caused by H. pylori,” ...

Helicobacter pylori (H. pylori) infections affect an ... such as the urea breath test, stool antigen test and serology, will be recommended as first-line options,” he said.

H. pylori can be detected with a blood, breath or stool sample test — and treated with antibiotics and other medicines. It is ...