[Sequelae of different clinical forms of the acute stage of tick-borne encephalitis].

One to 38 years after the disease onset follow-up examinations were carried out involving 311 survivors of acute tick-borne encephalitis (TBE). Subjects from different regions of the Soviet Union were examined. Three forms of acute period were identified: focal (FTBE), meningeal (MTBE) and pyretic (PTBE). Of 104 patients with a history of FTBE, 52 displayed the progression of the disease at some time while the rest developed the residual organic syndrome of varying severity. Patients who had suffered MTBE (173) and PTBE (34) showed signs of organic and functional disorders of the central nervous system. All the forms of TBE were marked by a prolonged asthenic period. Survivors of TBE are in need of a long-term outpatient observation irrespective of the form of acute TBE.