[Humoral immunity in subjects with a history of tick-borne encephalitis].

A total of 137 patients with a history of focal and meningeal forms of tick-borne encephalitis (TBE) were examined in the period from 1 to 7 years after the acute stage of the disease. In their examination the authors used hemagglutination inhibition test in the acute and the long-term periods and neutralization test in the late periods. Antibodies to the TBE virus were detected in individuals living in the western region of TBE prevalence (Latvian SSR).