(HealthDay News) -- A new study adds to evidence that chronic fatigue syndrome doesn't have anything to do with xenotropic murine leukemia virus-related virus (XMRV), but the researchers point out that there's a caveat regarding American patients.
"Although our patient group was relatively small and we cannot formally rule out a role of XMRV, our data cast doubt on the claim that this virus is associated with chronic fatigue syndrome in the majority of patients," the researchers report in the Feb. 26 online edition of the BMJ.
No one knows what causes chronic fatigue syndrome, which is thought to affect millions of people around the world. But a recent U.S. study found signs of XMRV in two-thirds of patients with the condition.
However, other studies, including this most recent one, suggest that there's no connection between the virus and chronic fatigue syndrome.
In the new study, researchers from Radboud University Nijmegen Medical Center in the Netherlands examined DNA from 32 Dutch patients with chronic fatigue syndrome and 43 healthy people. Read more...
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