I figure it could be used as a vaccine, provided people aren't irrationally squicked by the thought of the same kind of parasite that has possible ties to suicidal thoughts, encephalitis, and other neurological and physiological disorders. Also, that a form of toxoplasmosis makes rodents seek out cats to be devoured and spread the protozoan. Imagine if the nanoplasmosis started doing that for some kind of Emergent analog?
Finally, it might be easy to spread! It appears that a very large number of the human population has some form of toxoplasmosis in their system. Nanoplasmosis, deployed along similar vectors, could subtly prevent CFD expansion.