Sregan, there is also another reason why mycoplasma are likely.

Mercury Modulates Immunity at 15 ng/L:
"Evidence is emerging that exposure to mercury (Hg) may elicit many pathological manifestations, including immunomodulation"

http://alt.nntp2http.com/med/allergy/2007/05/e2486b3a96c8eb291c75556b262e6dfe.html

Immunomodulation means in this case a shift from Th1 activity to Th2, or the other way around. T-helper 1 cells (Th1) target organisms that invade cells, such as viruses, but despite being a bacteria, mycoplasma also belongs to this category, While T-helper 2 cells (Th2) target organisms that are found outside of cells, like other bacterias, parasites etc.

http://www.immunesupport.com/chronic-fatigue-syndrome-causes.htm

A shift towards Th2 activity appears to be dominant in mercury poisoning, however. So one should expect to have mycoplasma, and viral infections in mercury poisoning. Knowing this, and one can try to increase the Th1 activity, while suppressing the Th2 activity.