Unusual behaviour of serological tests for syphilis in Ugandan Africans.

The fluorescent treponemal antibody (FTA) test de- veloped by Deacon, Falcone, and Harris (1957) and later modified with the absorption procedure by The test combines the sensitivity and specificity of immunofluorescence with easy reprodu- cibility Com- pared with other serological tests, it is highly sensitive at all stages of the disease (Atwood, Miller, Stout, and Norins, 1968; Gamer, Grantham, Collins, and Roeder, 1968; Knox, Short, Wende, and Glicksman, 1966; Lassus, Mustakallio, Aho, and Putkonen, 1967) and nearly equals the Treponema pallidum immobilization test in specificity (Deacon, Lucas, and Price, 1966; Garner and others, 1968; Goldman and Lantz, 1971).