TPPA
Private TPPA testing in London for £71.99, confirming one Treponema pallidum antibody marker with results expected in around 1–2 days.
Turnaround time
1-2 business days
Biomarkers count
1
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Overview of the TPPA Test
The TPPA blood test detects antibodies directed against Treponema pallidum, the bacterium responsible for syphilis.
The test assesses 1 specialist serology marker: TPPA (Treponema pallidum particle agglutination).
TPPA stands for Treponema pallidum particle agglutination assay.
It is a treponemal antibody test, meaning it specifically looks for antibodies produced against Treponema pallidum.
TPPA is commonly used as a confirmatory investigation after an initial syphilis screening test is reactive.
Its role differs from non-treponemal tests such as RPR or VDRL.
Treponemal tests indicate that immune exposure to Treponema pallidum has occurred.
Non-treponemal tests are more useful for estimating disease activity and following response to treatment.
An important feature of TPPA is that it commonly remains positive for many years and often for life after a person has been infected.
This can remain the case even after syphilis has been successfully treated.
A positive TPPA therefore does not prove that syphilis is currently active.
Clinical history and an activity marker such as RPR are needed to distinguish previous treated infection from active disease.
Testing can also be negative very early after a new exposure because antibodies require time to develop.
Where recent infection remains possible, repeat testing may therefore be required.
Syphilis can progress through several clinical stages and can become asymptomatic for long periods.
Accurate serological interpretation is therefore particularly important.
What Does the TPPA Test Check?
The test detects Treponema pallidum-specific antibodies and is primarily used to confirm previous or current exposure to the bacterium responsible for syphilis. This test measures 1 specialist biomarker.
TPPA (Treponema pallidum particle agglutination)
Detects specific antibodies to Treponema pallidum and is used principally as a confirmatory treponemal test following reactive syphilis screening.
Who May Benefit From the TPPA Test?
TPPA is most useful when confirmation of Treponema pallidum exposure is required following screening or a previous uncertain syphilis result.
People with a reactive syphilis screening test - TPPA can help confirm that Treponema pallidum-specific antibodies are genuinely present.
People with a previous uncertain syphilis result - Confirmatory treponemal testing can clarify previous exposure.
People undergoing specialist sexual-health assessment - TPPA may form part of a structured syphilis testing algorithm.
People with symptoms compatible with syphilis - Serological testing can contribute to diagnosis when interpreted with symptoms and exposure history.
Pregnant people requiring confirmatory syphilis testing - Accurate maternal syphilis diagnosis is particularly important because infection can affect pregnancy.
People with a known previous syphilis diagnosis and unclear historical records - TPPA can remain reactive after past infection.
People whose RPR or VDRL requires confirmation - Treponemal and non-treponemal tests provide different information.
People advised to undergo confirmatory testing by a clinician or sexual-health service - TPPA is a recognised confirmatory assay.
How to Prepare
Do not delay appropriate sexual-health assessment while waiting for confirmatory testing where symptoms or recent high-risk exposure are present.
Previous successful treatment generally does not cause TPPA to become negative.
Symptoms and Reasons to Consider the TPPA Test
Syphilis can produce very different symptoms depending on the stage of infection and can also become completely asymptomatic.
A painless genital, anal or oral ulcer - Primary syphilis can present with a chancre at the site of infection.
A widespread rash including the palms or soles - Secondary syphilis can produce a characteristic systemic rash.
Unexplained swollen lymph nodes - Lymphadenopathy can occur during early syphilis.
A reactive syphilis screening result - TPPA may be required to confirm specific Treponema pallidum antibodies.
A sexual partner diagnosed with syphilis - Exposure requires appropriate sexual-health assessment.
Previous syphilis treatment with unclear documentation - TPPA may remain positive regardless of treatment success.
Pregnancy with a reactive syphilis screen - Confirmatory assessment should be completed promptly.
Concern about previous untreated exposure - Serology can help clarify whether antibodies are present.
TPPA does not determine whether syphilis is currently active.
A positive result needs to be interpreted with treatment history and, where appropriate, a non-treponemal test such as RPR.
Neurological, visual or hearing symptoms in somebody with possible syphilis require prompt specialist assessment.
How to Book Your TPPA Test
The TPPA test can be booked privately for confirmatory serological assessment of Treponema pallidum exposure.
Choose the TPPA
Select the individual TPPA blood test online.
Select your sample collection option
Choose an in-clinic blood draw or professional home or hotel phlebotomy where suitable.
Attend your appointment
A trained healthcare professional collects the required venous blood sample and relevant treatment or exposure history can be documented.
Laboratory analysis
Your serum undergoes TPPA testing for Treponema pallidum-specific antibodies.
Receive your results securely
Your authorised result is delivered securely and can be interpreted alongside screening tests and RPR or VDRL where appropriate.
When Will I Receive My Results?
The current live London Blood Tests page lists a turnaround of approximately 1–2 days after laboratory receipt for TPPA.
The sample undergoes specialist serological analysis, laboratory quality-control procedures and result authorisation.
Turnaround begins when the specimen reaches the laboratory rather than necessarily from the exact time of collection.
Additional RPR, VDRL or other syphilis testing can be required depending on the result and previous infection history.
Understanding Your Results
A negative TPPA result means Treponema pallidum-specific antibodies were not detected according to the assay threshold.
This makes previous syphilis exposure less likely.
However, testing can be negative during the early window period following a recent infection.
Repeat testing may be required where recent exposure remains clinically important.
A positive TPPA result confirms that specific antibodies to Treponema pallidum have been detected.
It does not determine whether the infection is currently active.
Treponemal antibodies frequently remain detectable after successful treatment.
A person with a previous adequately treated infection can therefore remain TPPA-positive indefinitely.
An RPR or VDRL result and the clinical history are generally used to provide information about current disease activity and treatment response.
TPPA should therefore be interpreted as an exposure-confirmation test rather than a treatment-monitoring marker.
Why Book With London Blood Tests?
London Blood Tests provides private TPPA testing for confirmatory syphilis serology.
Highly specific treponemal testing - TPPA detects antibodies directed against Treponema pallidum.
Useful after reactive screening - The assay can confirm that syphilis-specific antibodies are present.
Complements RPR or VDRL - Treponemal and non-treponemal tests provide different clinical information.
Can clarify previous exposure - TPPA commonly remains reactive after historical infection.
Relevant during pregnancy - Accurate confirmation of maternal syphilis is clinically important.
Rapid laboratory turnaround - Results are expected approximately 1–2 days after laboratory receipt.
Professional blood collection - Clinic and suitable home or hotel phlebotomy appointments are available.
Clear pricing - The TPPA test costs £71.99.
Private TPPA Blood Test in London
London Blood Tests provides private TPPA testing for people requiring confirmatory syphilis serology.
The test costs £71.99 and assesses 1 specialist biomarker.
Results are expected approximately 1–2 days after laboratory receipt.
A positive TPPA confirms Treponema pallidum antibody exposure but does not establish whether infection is currently active.