“…G eography and race (Schlaegel, Jr. 1984) and genetic factors (Brewerton et al 1973;Ehlers et al 1974;Mapstone & Woodrow 1975) play an important role in the epidemiology and etiology of uveitis. It has been shown that enteritic and urogenital infections may trigger acute anterior uveitis (AAU) in HLA-B27 positive patients (Saari & Kauranen 1980;Saari et al 1980a, b;1981;1986), some infectious agents, e.g., varicella virus may cause AAU also in HLA-B27 negative patients (Saari et al 1981), and many protozoa, viruses, bacteria, fungi, and parasitic worms may cause different types of infectious uveitis (Nussenblatt & Palestine.…”