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VDRL – titer (CMT) (Syphilis, Athashang) Screening

Known as: VDRL – Titer (CMT) Syphilis
SKU: 318

61.00

Study material: Venous blood
Response time (working day): 14
The test is done on an empty stomach: no
Home call service: Yes
Country: EU

General Information

VDRL – Titer (Venereal Disease Research Laboratory) – is a quantitative indicator that determines the level of antibodies in the blood SyphilisThe titer indicates how active the infection is and is used both for diagnostics and for monitoring response to treatment.

Syphilis is an infectious, contagious disease caused by the bacterium Treponema Pallidum and is transmitted through sexual contact, blood transfusion, and the placental route.

VDRL – titer

Clinical aspects:After entering the body, the pathogen easily spreads through the lymphatic system. The incubation period lasts from 15 days to 3 months.

Clinical manifestations of the disease are:

  • Early stage of infection
  • Late - non-infectious stage

Each form can include two stages:

  • Primary, secondary and early latent (hidden) syphilis
  • Late latent (hidden) syphilis and tertiary syphilis

Primary syphilis It is clinically manifested by genital chancre (nodular formation) and adenopathy (enlargement of lymph nodes). The chancre will regress within 2-6 weeks, even without specific treatment.

Secondary syphilisIt is clinically manifested by skin and mucous discharge (on the hands and feet, neck and face), sometimes accompanied by such symptoms as: fever. Joint pain, polyadenopathy (enlargement of lymph nodes), hepatitis, uveitis (inflammation of the vascular lining of the eye).

Clinical manifestations begin 6 weeks to 6 months after the development of chancre. Symptoms may last from a few days to several weeks, with intermittent periods of symptom-free periods. In untreated cases, the said phase lasts 1-2 years.

Early and later stages of latent (hidden) syphilisIt is going on without clinical signs. At this stage, diagnostics is possible only with serological studies.

I hear syphilis Clinically, it is characterized by skin gums, neurological (spinal cord degeneration, generalized paresis), cardiovascular (syphilitic aortitis, aortic aneurysm, coronary stenosis) manifestations. Symptoms of this stage appear 4-40 years after the initial injury. Through antibiotic therapy in the initial stages, tertiary syphilis is practically no longer found.

Congenital syphilis.There is a risk of transplacental transmission of Treponema pallidum infection. Diagnosis in pregnant women is complicated because there is a possibility of getting a false positive answer. In this case, the determination of FTA-ABS IgM or EIA-IgM antibodies allows to distinguish the residual antibodies of previously transferred syphilis from current syphilis.

 

 

 

 

 

 

 

Research material

Venous blood

 

 

 

 

When should we take the test?

  • Suspicion of syphilis (skin, mucous membrane lesions, ulcers)
  • After suspicious sexual contact
  • Screening for sexually transmitted infections (in risk groups)
  • Mandatory syphilis screening during pregnancy
  • Suspicion of neurosyphilis or systemic infection
  • Monitoring the effectiveness of syphilis treatment (titer dynamics)
  • Control after a previous infection (to rule out relapse)

Possible interpretation of the results

  • Negative
    → There is no serological evidence of infection (although it may not be detected in the very early stages)
  • Low titer (e.g. 1:2, 1:4)
    → It could be:
    • Early or late infection
    • Or the serological "trace" remaining after treatment
  • Medium/high titer (e.g. 1:8, 1:16, 1:32 and above)
    → More often indicates active infection

Treatment monitoring

  • Titer after successful treatment Gradually decreasing
  • A reduction of 4 times or more (e.g. 1:32 → 1:8) is considered For a good therapeutic response
  • A stable high titer may indicate:
    • On incomplete treatment
    • or reinfection
  • VDRL – titer  It is a non-specific test.
  • False positive results are possible (pregnancy, autoimmune diseases, other infections)
  • The final assessment should be done with confirmatory tests (TPHA, FTA-ABS)

 

VDRL titer is most often used to assess the activity of the infection and the dynamics of the response to treatment, not just for diagnostics.

Reference values

The following research methods are used to diagnose and monitor the effectiveness of treatment for Treponema pallidum infection:

  • Direct detection of the pathogen: microscopy, direct immunofluorescence reaction (RIF), molecular methods (PCR analysis);
  • Indirect detection of the pathogen (serological markers of infection).

Is based on the serological diagnostics of syphilis Treponemic and nontreponemic tests

 

The primary immune response is represented by IgM-type specific anti-treponemic antibodies, which are detected at the end of the 2nd week of infection; Anti-treponemic IgG antibodies appear later, in the 4th week. Thus, most patients have IgM and IgG antibodies in their blood at the onset of clinical symptoms. Specific IgM antibody levels decline rapidly after adequate treatment for early syphilis, but persistence of specific IgG antibodies persists until the end of life. The determination of this type of antibody is included in a set of treponemic tests.

Rapid test for syphilis antibodies  Used to qualitatively and selectively detect antibodies against T. pallidum (IgG, IgM and IgA) in whole blood, serum or plasma. The sensitivity of the test is 99.54%, the specificity - 100%.

Testing process

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Submission of material

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This medical information is not intended to be a universal treatment guide for all patients. The treatment process, including the type, volume, and frequency of diagnostic tests and therapeutic procedures, is determined by the physician individually — based on an assessment of the patient's condition and relevant medical indications. The decision is made in consultation with the patient. Before purchasing a test, please read the instructions for its preparation.
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