Tuberculin is a bacterial component of Mycobacterium tuberculosis, including pure protein derivative (PPD) and old tuberculin (OT). This test has reference significance for the diagnosis of tuberculosis and the determination of nonspecific cellular immune function.
Intradermal injection is a common method. After routine disinfection, the test solution was injected into the skin of forearm flexion and the results were observed for 48 ~ 72 hours. If the result is not clear after 48 hours, the result of 72 hours should prevail, and pay attention to whether there is induration locally, rather than simply blushing.
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