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Treponema Pallidum Heamagglutinition (TPHA)

Overview
Interpreting Results

Overview of TPHA

What is TPHA?

The Treponema Pallidum Agglutination Assay is performed to screen for and diagnose an infection by the Treponema pallidum bacterium causing a sexually transmitted disease, Syphilis.

Why is TPHA done?

The test is performed when symptoms of syphilis appear, including a chancre on the throat or the genitals, or a skin rash typical of syphilis. The test is also performed in case there is a risk of contracting a sexually transmitted disease through unsafe sexual intercourse, in case of a previous positive diagnosis of AIDS, and as a part of routine tests during pregnancy.


Preparation for TPHA

  • No special preparation required

Sample Type for TPHA

The sample type collected for Treponema Pallidum Heamagglutinition is: Blood

Interpreting TPHA results

Interpretations

A positive result is indicated by the gelatin particles clumping together in the test dish, indicating presence of antibodies against the bacterium in the blood of the patient caused due to an infection.


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