Here's another one: Xenotropic/Ectropic Murine Leukemia Virus Testing
from http://www.millipore.com/publications.nsf/dda0cb48c91c0fb6852567430063b5d6/ced3d5c4cd56f3ab852571ea00776798/$FILE/SDS1703ENEU.pdf This document makes me wonder if labs like this might join the race to produce human XMRV testing too.
Of course, this test is only for rodents, not humans. The lab is not licensed for human testing, only animals. To be clear, I am posting this as a courtesy to other rodent owners here and not trying to sell anything.