http://www.cfids.org/xmrv/default.asp
The CAA reported the following on their XMRV page:
A number of question have been raised by various people about this statement. Is it correct to say that the WPI was the only lab. Firstly, the chart next to this statement shows the FDA to also have found XMRV in the sample that was not spiked. Secondly, the test was to look for spiked samples, not real live XMRV virus. Therefore the sample that was not spiked may actually have XMRV, but would not be detected by tests which use primers and probes set for an artificial clone.
The CAA reported the following on their XMRV page:
The U.S. Department of Health and Human Services announced in October 2009 that it would support studies to assess the potential risks to the blood supply and that will also help standardize tests for XMRV. At the July 26, 2010 meeting of the Food and Drug Administration's (FDA) Blood Products Advisory Committee, seven groups made informational presentations about XMRV, including researchers at the FDA, NIH and CDC. The Department of Health and Human Services Blood XMRV Scientific Research Working Group, of which Association scientific director Suzanne D. Vernon, PhD is a member, reported results from Phase I of its four-phase study. Analytical panels of blinded samples of XMRV and negative controls were tested by six laboratories (including the Whittemore Peterson Institute) to assess results using different methods. All six laboratories were able to detect XMRV in whole blood using nucleic acid testing and four of five plasma RNA assays performed well. CDC's whole blood assay was the most sensitive, while WPI was the only lab reporting an unexplained false positive result on a negative sample. (Presentations made at the July 26 meeting will be posted on the FDA's website soon.) Further work on the analytical panels will continue as the other three phases of the study are completed. Results of Phase II testing of blinded clinical panel samples are expected by fall 2010.
A number of question have been raised by various people about this statement. Is it correct to say that the WPI was the only lab. Firstly, the chart next to this statement shows the FDA to also have found XMRV in the sample that was not spiked. Secondly, the test was to look for spiked samples, not real live XMRV virus. Therefore the sample that was not spiked may actually have XMRV, but would not be detected by tests which use primers and probes set for an artificial clone.