Tuberculosis (TB) screening tests help to determine whether a person has been infected with Mycobacterium tuberculosis bacteria, the cause of TB. For an interferon gamma release assay, a blood sample is drawn by needle from a vein in the arm Test preparation needed? A small amount of purified protein derivative (PPD) solution is injected just under the first layer of skin of your inner forearm. When you have been in close contact with someone who is known or suspected to have tuberculosis (TB) when you have diseases or conditions that weaken your immune system and put you at a greater risk of developing active TB when you are about to start a treatment that will weaken your immune system and put you at risk of developing active TB when you are confined in living conditions such as a nursing home, school, homeless shelter, migrant hostel, detention centre, or correctional facility when you inject illegal drugs when you have lived for a period of time in or come from a foreign country where TB is more common when you have an occupation, such as health care worker, that will bring you into close contact with those who may have active TB sometimes as part of an examination prior to starting school or a new job where you could spread TB Sample required?įor a tuberculin skin test, no sample is required. It does not distinguish the difference between active or latent infection When to get tested? TB screening tests help to determine whether you may have been infected with the Mycobacterium tuberculosis bacteria. Purified Protein Derivative PPD Mantoux Latent Tuberculosis Infection Test Interferon-gamma Release Assays IGRA T-Spot®.TB QuantiFERON®-TB Gold (QFT-G) QuantiFERON®-TB Gold In-Tube (QFT-GIT) QuantiFERON®-TB Gold Plus Why get tested?
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