In immunocompetent patients the postnatally acquired toxoplasmosis is
usually a mild or asymptomatic disease. CNS manifestations are rare, e
.g. in patients with HIV infection or in patients with other types of
immunosuppression. We report on a 9-year old healthy boy, who was hosp
italized after one week with subfebrile temperatures and headache with
clinical signs of encephalitis and unilateral deafness. We diagnosed
a toxoplasmosis and treated the patient with pyrimethamine and sulfadi
azine. While most of the signs and symptoms disappeared rapidly the de
afness persisted.