Tuberculosis (TB) screening tests are not used as general population screens but are used to screen people who are at high risk for TB exposure, such as:People with diseases or conditions that weaken the immune system, such as HIV or AIDS, which makes them more vulnerable to a TB infectionThose who are in confined living conditions such as homeless shelters, migrant farm camps, nursing homes, schools, and correctional facilitiesHealthcare workers and others whose occupations bring them in close contact with those who may have active TBThose who have been in close contact with someone who has an active case of TBPeople who have signs and symptoms consistent with active tuberculosisThose who come from or have lived for a period of time in a foreign country where TB may be more commonThose who inject illegal drugs TB screening tests are also used sometimes as part of a routine examination prior to starting school or a new job. Since mothers can pass TB to their unborn children, pregnant women are sometimes screened.Either a tuberculin skin test (TST) or an interferon gamma release assay (IGRA) may be performed to screen for TB:The tuberculin skin test involves two steps: the injection of a small amount of purified protein derivative (PPD) solution under the first layer of skin of the forearm and an evaluation of the injection site conducted by a health practitioner at 48 and/or 72 hours to see if a local skin reaction has occurred.The IGRA test measures the release of a substance called gamma interferon by white blood cells in a sample of blood when the cells are exposed to specific TB antigens. The IGRA test is not performed by all laboratories. The test requires viable white blood cells, so the IGRA blood sample must be received and tested by a laboratory within a designated window of time.
Sample Type - Blood
Reporting Time - 1 Day
Prerequisites - No special preparation required
Price - ₹3390/-
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