You may find some helpful information on the is thread:
Borrelia miyamotoi anyone?
https://forums.phoenixrising.me/threads/borrelia-miyamotoi-anyone.77983/
This thread caught my eye because Dr. De Meirleir spoke yesterday at the IACFS/ME conference. I can't remember his exact statistics and don't have access to the recorded presentations yet but, according to his data, a high percentage of ME/CFS patients tested positive for B. miyamotoi via phage PCR (I think around 80%) compared to non-ME (I think around 20%).
Phage PCR is used because the presence of phage genetic material is apparently about 10x higher in blood compared to B. miyamotoi genetic material. The phage is allegedly specific only to B. miyamotoi.
When asked if he would expect his data to change depending on geographical location, he stated that the results are the same from multiple geological locations, which would indicate a vector or transmission beyond the deer tick.
He believes B. miyamotoi should be investigated as a cause of ME. He did not go into treatment in the talk.
Personally, I am not sure what to make of his data and am skeptical. I would want to validate the presence of the spirochete through some other method. Maybe someone here has done a deeper dive into research on this topic and the validity of phage testing for B. miyamotoi and borrelia spp in general.