I think it would be counterproductive to try to engage with comments on Virology blog. The place for rational discussion is here, I think.
The point about brain lesions on imaging is intriguing. I think there is a false argument involved.
As I understand it:
1. The epidemic at the Royal Free, and maybe also in Iceland and elsewhere, was said to include cases of paralysis and also perhaps some cranial nerve lesions.
2. Paralysis occurs in poliomyelitis because of lower motor neurone cell body damage in the cord and is flaccid (floppy).
3. Perhaps because of other neurological findings as well as paralysis at Royal Free it was suggested that it might be due to an infection that produced not just myelitis but encephalitis as well - encephalomyelitis.
4. When encephalitis produces paralysis it is always (long term) a spastic paralysis. As far as I know none of the RF cases had spastic paralysis and nobody with ME since has been found to have spastic paralysis.
5. So the reason for calling ME encephalomyelitis was based on a mistake. It was not based on finding brain lesions on scans because there were no scans then. It was based on an inference of brain lesions that in hindsight was not good neurology.
6. So there is no reason to think that brain lesions on scans in any way point to a diagnosis of ME. If anything the presence of brain lesions in someone with clinical ME points to them having some other undiagnosed encephalopathy, not the illness Ramsay reported. The illness Ramsay reported did not include evidence of brain lesions.
So is the illness we (or most here) have the same as what Ramsey found, something which overlaps it, or something different but related? I didn’t include ‘entirely different and unrelated’ because of the similarity of several unusual symptoms, specifically worsening for sometimes a long period after attempting normal activity.