Can we say Dr. Singhs study showed that they couldnt find XMRV with their own assay? Didnt they did detect mouse contaminant in 5% of their samples? Dr. Vernon quotes the study as saying: Using this assay, we found approximately 5 percent of our samples to be positive for products of the expected size, regardless of whether they were patients or healthy volunteers. Am I misunderstanding something here? Although the study failed to report this finding, Dr. Singh tells Mindy Kitei that they detected XMRV in their cultured positive controls as well. (All positive controls grew XMRV--as one would expect.) Mindy quotes the study: After weeks 2, 4, and 6, cultures were lysed and analyzed by Western blots...and by qPCR for XMRV.