Physicians have been mystified by chronic fatigue syndrome, a condition where normal exertion leads to debilitating fatigue that isn’t alleviated by rest. There are no known triggers, and diagnosis requires lengthy tests administered by an expert. Now, for the first time, researchers report they have identified biological markers of the disease in gut bacteria and inflammatory microbial agents in the blood.

Source: Chronic fatigue syndrome is in your gut, not your head — ScienceDaily