When you have TB symptoms, you should get a tuberculosis test. Following that, your sample is sent to a lab for examination and determination of whether or not you have tuberculosis. After 48 to 72 hours, the TB test provider will request that you return to the clinic so that the injection site may be thoroughly checked to confirm or rule out a positive result.ĭuring the blood test, the TB test practitioner takes a small sample of blood from your arm with a tiny needle. A positive reaction to PPD, which is generated from tuberculosis bacteria, can indicate that you have had tuberculosis. Neither test necessitates any extra preparation.ĭuring the skin test, the TB test provider injects a small protein called PPD beneath the first layer of your skin. It won't tell you whether your illness is current or latent, but it will tell you if you've had this bacterial infection before.Ī tuberculosis test can be performed on the skin or in the blood. A tuberculosis test identifies whether or not you've ever been infected.
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