I know this is a couple of months after your post, but having just read it, I need to respond with the fact that your CFS (etc.) specialist (is this a doctor?) was ordering tests for viruses that were theorized as far back as the 1980s as possibly being involved in CFS/ME. I remember this because I HAD CFS/M.E. back then, and spent a lot of time in the university library researching on Medline. One whoopie British doctor gave a presentation there who was big on the EBV reactivation theory and I actually called him on it during questioning because there was a great deal of research that failed to support that hypothesis.
But yes, EB virus, cytomagaolvirus, etc. etc. were all being cited and studied as possible culprits and yet, some forty years later, the conclusion is...inconclusive!
CFS/M.E by the way, is likely the same as LC, and they both manifest in similar, varied, and somewhat loopy ways.
Personally, my theory is that all this viral "reactivation", when it can indeed be confirmed, is likely a SYMPTOM of this illness/syndrome, and NOT a CAUSE!
Therefor, going on anti-viral drugs to suppress those particular viruses is not going to necessarily relieve the symptoms of the disease itself.
I'm hoping that what might still remain and not be undone of the 1.1 Billion dollars in funding that the CDC had been allocated to study this now pretty prevalent disease might actually uncover a bona fide etiology, and hence, hopefully, a proper effective treatment.
In the meantime, I shall as patiently as possible await the cure for me that worked last time, namely the passage OF time, (two years in my case).
Best of luck, though, in any case, and please do keep us posted on any progress!