Here is the worm study.A new study establishes a link between specific bacteria species and physical manifestations of neurodegenerative diseases. Neurodegenerative diseases such as Alzheimer's, Parkinson's and ALS affect millions of adults, but scientists still do not know what causes these diseases, which poses a significant roadblock to developing treatments or preventative measures. Recent research suggests that people with these conditions exhibit changes in the bacterial composition of their digestive tract.
Link to a more reader-friendly Science Daily article is here.