> the onset of ME/CFS is often associated with viral infections by patients I can personally attest to this. I was an extremely energetic person (shooting straight out of bed in the morning, never requiring daytime naps or rests) until one specific week in April of 1996 when I had what I thought was a mild flu. The post-flu fatigue never really went away. I became acclamatised to it over the years and rarely notice i…
"Seabiscuit" author Laura Hillenbrand wrote a disturbing (to me) essay entitled "A Sudden Illness" recounting the exact moment of the onset of her struggle with CFS. The apparent precursor infection was strep. https://www.newyorker.com/magazine/2003/07/07/a-sudden-illne... Also, Dianna Cowern, "Physics Girl" has been dealing with long COVID and CFS/ME for about a year now. Horrible. https://twitter.com/thephysicsgirl…
S. pyogenes has been implicated in other autoimmune disorders like psoriasis [2], which we know can be triggered by strep bacteria. In psoriasis, we have some evidence that it may set off a kind of bogus vicious cycle where a type of T-cell called a tissue-resident memory T-cell is "programmed" by an initial bacterial infection, but gets into a confused state where inflammation keeps going even long after the bacteria are physically gone. With other disorders, PANDAS [3], the cross-reactivity causes strep affect the brain and cause neuropsychiatric symptoms.
In some cases, strep bacteria are thought to linger in the body even long after a symptomatic infection, hiding in biofilm or in reservoirs like the tonsils, occasionally re-emerging to cause an immune response, similar to the Epstein-Barr virus. I would not be surprised if strep turns out to be the ultimate cause of some illnesses like ME.
[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6684244/