I just watched an interview of a Medical Doctor who treats Chronic Fatigue and how he looks for stealth/hidden infections like Borrelia, Babesia, Bartonella, Mycoplasma, and Cytomegalovirus.
It was a short video, so he wasn't able to go into a lot of detail, but he hit some high points -- mentioning Lyme Disease, PCR/Serology/Urine testing, his use of Byron White Formulas, and die-off support.
One of the labs he mentioned, regarding testing for fungus (mold and yeast) in the sinuses, was Microbiology DX. Since I'd not seen that lab listed recently (I saw it in a few old posts), I thought I'd mention it.http://www.microbiologydx.com
Maybe it will be helpful to someone, at some point.