Suspect bacterium may trigger Parkinson’s

Mouse study finds stomach ulcer-causing microbes may also affect brain

NEW ORLEANS — Brain cells may be the latest victim of a bacterial bad guy already charged with causing ulcers and stomach cancer.

Helicobacter pylori, a bacterium that lives in the stomachs of about half the people in the world, may help trigger Parkinson’s disease, researchers reported May 22 at a meeting of the American Society for Microbiology.