Treponema pallidum Hemagglutination Assay (TPHA) is a treponemal test for the serologic diagnosis of syphilis, a sexually transmitted infection caused by a Spirochetes, Treponema pallidum.
TPHA has been used as a confirmatory test for the diagnosis of Treponema pallidum infection.
Results Test Cells
Strongly Reactive Full cell pattern covering the bottom of the well.
Weakly Reactive Cell pattern covers approx. 1/3 of well bottom
Indeterminate (Equivocal) Cell pattern shows a distinctly open centre
Nonreactive Cells settled to a compact bottom, typically with a small clear center.
