urbantravels
disjecta membra
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This seemed like a good one to me - reasonable, balanced. Headline kinds weak but that's a minor quibble. Dateline says NYT but I can't find it on the NYT website yet, it seems the Seattle Times reprint actually made it to the Web first. Thanks to XMRV Global Action on Facebook for a very timely share:
http://seattletimes.nwsource.com/html/living/2013837533_fatigue04.html
http://seattletimes.nwsource.com/html/living/2013837533_fatigue04.html
The new papers in Retrovirology reported that contamination of tissue samples or other laboratory items with mouse DNA or viral genetic material could lead to false positive results for XMRV, and by extension other MLV-related viruses, specifically when using polymerase chain reaction technology. The technique rapidly produces millions of copies of genetic segments, so even minute traces of genetic contamination can skew results.
"Our conclusion is quite simple: XMRV is not the cause of chronic fatigue syndrome," said the senior author of one of the studies, Greg Towers, a professor of virology at University College London, in a statement released by Wellcome Trust Sanger Institute, the British research center that co-sponsored it.
Other scientists and advocates for patients have sharply criticized such certainty as unwarranted, noting that the Retrovirology papers themselves expressed their findings in more cautious terms. The critics agree that contamination can be a serious issue when using polymerase chain reaction technology. But the new papers, said Eric Gordon, a doctor in Santa Rosa, Calif., who treats many patients with the illness, do not evaluate other strategies besides PCR, as the technique is known, for detecting the MLV-related viruses, like testing for an immune response and culturing the viruses in cell lines.
"The articles make the point that PCR doesn't work that well for these viruses, and then they act like that disproves the whole idea," Gordon said.