Its true that once its created the virus has the potential to do anything. Once its created it has the potential of leaving the laboratory and moving out into the population (and then possibly coming back into the laboratory).
So far as I can tell the crux of the matter is the genetic diversity of the patient samples. If the XMRV samples from prostate cancer and CFS patients were more diverse genetically than found in the virus produced in the lab then then you would think - aha! they came from humans and then got into the lab. (Population sources are almost always the most genetically variable).
However, at least at this point, they actually seem less diverse than XMRV produced in the lab - even though the samples come from humans from all the over the US and Europe - that suggests they came from the lab virus and did not infect humans - where they would have mutated - but simply got into lab cultures and reagants and ultimately (somehow - nobody has shown how yet) into the WPI and Silverman samples.
There are only two complete sequences of XMRV from CFS patients - so it is conceivable that they are missing some of the variability found in the CFS population. However the WPI reported that all the gag and env sequences in their CFS patients were very alike - which suggests that the variability is not very high. Still we don't know until we know.
The other big problem facing XMRV is that even if it is a 'contaminant' most labs are still not finding it... in autism or FM or in previously positive CFS patients or in HIV patients or anywhere. Except for the Alter/Lo and Hansen findings - which are for MLV's - we still don't have an independent lab that has actually found XMRV I don't think in CFS patients.
The spanish have found it Cort, Gemans too though not CFS, but immuno compromised patients. and in saliva from the throat, agreed rather different. but both are independent of the WPI But thats it i think ? unless we include Kenny de melier ( red labs isnt it ? )
Whats interesting is some positives from the wpi were not able to be detected, here presented at the CROI, which is rather odd from a contamination of blood by live viruses scenario, clearly if the WPI was detecting live virus contamination ( as is now the new hot topic ) then how does one explain this rather unusal finding of a technique that could detect XMRV in monkeys, but failed to detect a suspected live virus contaminent from the wpi samples ? its just getting weirder and weirder, one can only conclude that if the live virus contamination theory was correct ? then in this example the detection method was some how failing between monkey and human samples. which is more than a little odd. Its downright bewildering. and possibly makes us less certain of detection methods across the board, regardless of what we are being told. Heres the proof if the live virus contamination theory really does hold true for the WPI samples
qoute
Kearney described a technique that could detect of single copy of XMRV or MLV in the same assay (X-SCA) and an approach for sequencing single XMRV genomes. Using X-SCA, Kearney was not able to detect XMRV in 26 CFS samples from four patients who were reported to be XMRV-positive in the Lombardi paper, nor in 134 prostate cancer patients of unknown XMRV status. However, she was able to detect XMRV DNA in the blood of two macaques consistently up to 80 days post-inoculation. END
Agreed this technique maybe new, but it could still detect it in monkeys, and from what it appears consistently so. These kind of discrepencies do not fill me with trust with much of what is going on, how can it. a theory is produced that explains nicely why the wpi almost exclusively are finding xmrv ( live virus contammintaion ) yet a detection method that is clearly detecting xmrv, cant find such said live virus contamination. to ignore these discrepencies is foolish in my opinion. I belive that this is proving some detection methods, seem to be failing, at least intermittently. and if thats so how many ? and what types are detecting it, then failing to in human samples Maybe i should add ill bet judy gave this group her 4 strongest samples, meaning ill bet they grew xmrv in culture, and was positive for serology too. so a conclusion that these 4 samples were false positives by the WPI seems a little unlikely if im right about the detections done on these samples, before being shared with this group, who apparently can detect it, but apparently cant as well lol This is turning into one of the biggest medical mysterys of all time is it not. Its just nuts, talk about a non ME brain ach