Multiple Sclerosis- I think this is one way MS could be caused: P. gingivalis interacting with Epstein-Barr Virus.
Effects of Porphyromonas gingivalis on the central nervous system:
The present study provides evidence that infection with a periodontal pathogen, such as P. gingivalis, may play a role in the pathogenesis of CNS inflammatory disorders such as MS.
Study identifies how Epstein-Barr virus triggers multiple
sclerosis
A new study found that part of the Epstein-Barr virus
mimics a protein made in the brain and spinal cord, leading the immune system
to mistakenly attack the body’s nerve cells.
These findings suggest that the interaction between EBV
and P. gingivalis is bi-directional, with EBV reactivation suppressing host
defenses and permitting overgrowth of P. gingivalis, and P. gingivalis having
the potential to induce EBV reactivation.