[Chorioretinitis caused by toxoplasmosis: study of 65 cases].

Sixty five patients with an ophthalmoscopic diagnosis of chorioretinitis who, underwent complement fixation tests and intradermoreaction using Toxoplasma antigens were studied. 95,4% of them disclosed antibody titers with the former and 58,5% reactors were found with the latter. Sixty five individuals with neither backgrounds nor clinical symptoms of toxoplasmosis were used as control, and 27,7% of reactors in both tests were likewise found. The differences among results are highly statistically significant; this points out toxoplasmosis as an important cause of chorioretinitis in our patients. Complement fixation tests were more sensitive than intradermoreactions as well as specific as the latter. Results were correlated to age, sex and animal contacts.