Ocular toxoplasmosis among negro immigrants in London

Abstract

Of 950 patients attending the Uveitis Clinic at the Institute of Ophthalmology, London, 79 were diagnosed as having ocular toxoplasmosis. Of these 79, 27 were Negro immigrants (34-2 per cent.); this was a much higher incidence than could be expected on a population basis. Negro patients with toxoplasmosis showed significantly higher dye test titres than Caucasian patients. A relatively high incidence of ocular toxoplasmosis was noted in Negro immigrants from West Africa. Peripheral chorioretinal lesions due to toxoplasmosis were found to be significantly more common among Negroes than among Caucasians.