Unusual presentation of acquired toxoplasmosis in an immunocompetent adult.

We report an unusual clinical presentation of toxoplasmosis. Fever and headache were the only complaints of a 48-year-old immunocompetent man who was found to have a rash, hepatitis and a pericardial effusion. Lymphadenopathy was not present. Evolving atypical lymphocytosis was the clue to the diagnosis of toxoplasmosis. Undercooked meat was the probable source of infection.