Source : Webster's Revised Unabridged Dictionary (1913)

Filariasis \Fil`a*ri"a*sis\, n. [NL.] (Med.)
   The presence of filari[ae] in the blood; infection with
   filari[ae].

Source : WordNet®

filariasis
     n : a disease caused by nematodes in the blood or tissues of the
         body causing blockage of lymphatic vessels