6,520 patients with symptoms attributed to toxoplasmosis were evaluated for the prevalence of IgG anti-Toxoplasma gondii, employing the indirect immunofluorescence test. 51.27% of the evaluated proved to be positive. 60.85% of the patients with ocular disorders were seropositive to IgG anti-T.gondii; followed by 56.25% and 48.10% from those with general and gynecobstetric disorders. The symptoms and manifestations which showed the greatest positivity percentages were: asthenia, chorioretinitis, menstrual disorders, cephaleas and uveitis.