Treponema pallidum immobilization test

Treponema pallidum immobilization test
Treponema pal·li·dum immobilization test -'pal-əd-əm- n a serological test for syphilis in which a solution containing the living causative spirochete (Treponema pallidum) is combined with serum in the presence of complement with immobilization of the active spirochetes indicating a positive result abbr. TPI

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TPI test; the first (1949) treponemal antigen serologic test for syphilis; live Treponema pallidum was mixed with patient serum and complement and examined to see what proportion of treponemes were immobilized by antibodies in the serum.

Medical dictionary. 2011.

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