I do salt with vitamin C therapy for lyme disease. Dr. Townsend uses it for lyme as a preliminary step to de-worm. I believe many folks who have chronic fatigue really have lyme or some hidden infection. There are some conditions where salt does actually have to be limited such as kidney disease or some (not all) cases of high blood pressure.
Here's an article on lyme disease and how many diseases are being falsely diagnosed when lyme is the cause. It also talks about the standard Elysa test which gives a HUGE number of false negatives. There are links to labs with better tests.
I also believe cfs can be caused by stuff like candida, viruses, mycoplasma, etc. However after studying about lyme, I see that it's at epidemic levels and frequently misdiagnosed. It's thought to be spread by mosquitos, blood, etc. and it's travelled around the world through bird migration. Apparently the ticks travel with the birds. We can do all the cleansing and rebuilding we want, but if you don't get at an infection it's tough to go all the way into good health.