Tuberculosis blood test accuracy

Using tests currently available in Tuberculosis blood test accuracy commercial blood (serological) tests to diagnose tuberculosis (TB) often leads to misdiagnosis, wrong active treatment and potential public health risk, according to the WHO recommendation policy published today ‘hui. WHO urges countries to ban the inaccurate blood tests are not approved and instead rely on accurate microbiological or molecular analysis, as recommended by WHO.


Tuberculosis can be misdiagnosed

Tuberculosis blood test accuracy

Testing for active TB antibodies or antigens found in the blood is extremely difficult. Patients may have an antibody response suggesting that they have active TB even when they do not. Antibodies may also develop against other organisms which in turn may indicate erroneously that have active tuberculosis. In addition, different organisms have the same antigens, resulting in reliable evidence. These factors can result in TB disease not identified or misdiagnosed.
The use of blood tests to diagnose tuberculosis (TB) often leads to a bad Active diagnosis, says the World Health Organization (WHO), which calls on all countries to stop using the test and instead is “trust recommended by WHO or molecular microbiological tests accurate data.
This is the first time the agency has issued a recommendation for global health policy “negative” related to tuberculosis, what they say, “underscores the determination of the Organization” to advise governments when strong evidence that general practice hurts more than good.
The FDA has approved two test release test (IGRA) for TB infection, gamma-interferon. Both tests are:
QuantiFERON-TB Gold test tube (GFT-GIT)
T-SPOTĀ®.TB.
The IGRA identify the presence of Mycobacterium tuberculosis infection by measuring the immune response to the TB bacteria in whole blood. These tests can not determine whether a person has latent TB infection or active TB. Further tests are needed to diagnose TB disease.
Blood is collected by a provider of health care and sent to a lab for processing. The laboratory should start treating blood 8-30 hours after collection (depending on the test used). The test results are usually available within 24 hours.
The test results are possible:
Positive: There was an immune response that indicates the presence of TB bacteria.
Negative: I did not have an immune response that indicates the presence of TB bacteria.
Clear Results: Perpetual. Possible evidence of error or the results are inconclusive.
Borderline (only T-SPOTĀ®.TB): Results in a limited area and you can not really tell if it’s Tuberculosis blood test accuracy positive or negative.

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