Rudellian brain fever
Rudellian brain fever was an infectious disease that could cause mental problems.

In 2373, Miles O'Brien at first speculated there had been an outbreak of Rudellian brain fever on Bajor, when his wife told him she wasn't Keiko; in fact, however, Keiko's body had been taken over by a Pah-Wraith. ()

See also 
 Rudellian plague

External link

Medical conditions