Gut bacteria and aquatic bacterium linked to Parkinson's disease.

Researchers at Helsinki University have identified strains of the Desulfovibrio bacteria as a likely cause of Parkinson's disease, with genes playing only a minor role. The study suggests that environmental exposure to the bacteria is the primary cause of the disease, and carriers can be screened and the bacteria removed from the gut. Parkinson's disease affects muscle control, balance, movement, and mental health, and is more common among men, usually starting around age 60.