Ad
related to: treponema pallidum antibodies reactive meaning
Search results
Results from the WOW.Com Content Network
Tests based on monoclonal antibodies and immunofluorescence, including T. pallidum hemagglutination assay and fluorescent treponemal antibody absorption are more specific and more expensive. Nontreponemal tests (NTT) measure levels of immunoglobulin G (IgG) and immunoglobulin M (IgM) antibodies produced by the host in response to lipoidal ...
The fluorescent treponemal antibody absorption (FTA-ABS) test is a diagnostic test for syphilis.Using antibodies specific for the Treponema pallidum species, such tests would be assumed to be more specific than non-treponemal testing such as VDRL but have been shown repeatedly to be sensitive but not specific for the diagnosis of neurosyphilis in cerebrospinal fluid (CSF).
TPHA is an indirect hemagglutination assay used for the detection and titration of antibodies against the causative agent of syphilis, Treponema pallidum subspecies pallidum. [citation needed] In the test, red blood cells (erythrocytes) are sensitized with antigens from T. pallidum pallidum. The cells then aggregate on the surface of a test ...
Treponema pallidum particle agglutination assay and the Toluidine red unheated serum test (TRUST), which may be used to confirm a positive VDRL result, are more specific for syphilis than non-treponemal tests and in the presence of a positive test, more likely indicate active infection.
Treponema pallidum pallidum is a motile spirochete that is generally acquired by close sexual contact, entering the host via breaches in squamous or columnar epithelium. The organism can also be transmitted to a fetus by transplacental passage during the later stages of pregnancy, giving rise to congenital syphilis. [ 53 ]
Additionally these tests may show false-negative when the patient's antibody titer is very high due to a hook effect (also called a prozone effect). Because of the issues with false positives, confirmation with a second treponemal test that is specific for T. pallidum antibodies is recommended. [5] [6]
Treponema is a genus of spiral-shaped bacteria. The major treponeme species of human pathogens is Treponema pallidum, whose subspecies are responsible for diseases such as syphilis, bejel, and yaws. Treponema carateum is the cause of pinta. [2] Treponema paraluiscuniculi is associated with syphilis in rabbits. [3]
The CSF is tested for antibodies for specific Treponema pallidum antigens. The preferred test is the VDRL test, which is sometimes supplemented by fluorescent treponemal antibody absorption test (FTA-ABS). [1] [2] [3] Historically, the disease was studied under the Tuskegee study, often cited as an example of unethical human experimentation.
Ad
related to: treponema pallidum antibodies reactive meaning