[Identification of treponemes in paraffin-embedded sections, using an anticomplement immunofluorescence technique]

Treponema in syphilis or non venereal treponematosis can be demonstrated in paraffin embedded tissues, with immunological techniques. Anti-C3 immunofluorescence shows treponemas in 6 of 12 biopsies from 8 patients suspected of treponematosis. This method is easier and quicker than silver impregnation in spite of weak sensitivity.