Tonsilar toxoplasmosis.

One hundred cases were suffering from chronic tonsillitis, aged between 4-12 years, of both sexes (60 males and 40 females), from outpatient clinic of E.N.T. unit at Benha Faculty of Medicine. They were examined serologically by indirect haemagglutination--antibody technique (IHAT) for toxoplasmosis. After tonsillectomy, histopathological and electronmicroscopical studies were done. Ten percent of cases were positive serologically, among males (11.71%) and females (7.5%). The positivity rate was high among age group 10-12 years than others. Two cases showed histopathological and ultrastructural changes indicating toxoplasmosis.