title: The demonstration of Treponema pallidum with fluorescent antibody techniques in the primary stage of syphilis.
mesh_terms: D000937:Antigen-Antibody Reactions; D003429:Cross Reactions; D005455:Fluorescent Antibody Technique; D013587:Syphilis / Q000175:diagnosis*; D014210:Treponema pallidum / Q000302:isolation & purification*