[Study of the direct immunofluorescence method for the differentiation of trichomonad serotypes]

It is possible to differentiate the serotypes of Trichomonas vaginalis by the direct immunofluorescent method using the tupe-specific antisera labelled with fluorescein-isot-hiocyanate. The most decisive factor in expressing the degree of induced fluorescence is the serotype of the protozoa. Evans blue, which has an intensive red fluorescence, totally eliminates the green autofluorescence of T. vaginalis and does not influence the induced specific fluorescence.