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Double-staining procedure for the fluorescent treponemal antibody absorption (FTA-ABS) test.
  1. E F Hunter,
  2. R M McKinney,
  3. S E Maddison,
  4. D D Cruce

    Abstract

    The fluorescent treponemal antibody absorption (FTA-ABS) double-staining procedure was reproducible, comparable to the conventional test, and easy to read. We recommend the use of the FTA-ABS double-staining procedure for microscopes with incident illumination, the 100 x/1.30 oil achromatic objective and the 6.3 x ocular to obtain optimal fluorescence, and the KP560 as a barrier filter to exclude rhodamine emission when fluorescein fluorescence is read. With this system, errors related to poor focusing or failure to visualise treponemes on all smears should be eliminated.

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