Chronic fatigue syndrome, a condition where normal exertion leads to debilitating fatigue that isn’t alleviated by rest, has long mystified scientists. There are no known triggers, and diagnosis requires lengthy tests. Some have suggested the disease may be psychosomatic. 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. In a new study published in the journal Microbiome, scientists describe how…