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The page below is a sample from the LabCE course Tuberculosis Awareness for Health Care Workers. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Rapid Diagnosis of TB

A molecular test is currently available for rapid diagnosis of TB. The GeneXpert MTB/RIF assay simultaneously detects the DNA in M. tuberculosis and resistance to rifampin (RIF) in less than 2 hours. The information provided by this test aids in selecting treatment regimens and reaching infection control decisions quickly; however, the Xpert MTB/RIF assay does not replace the need for smear with microscopy for acid-fast bacilli, culture for mycobacteria, and growth-based drug susceptibility testing.

Reference: CDC website. Available at:
https://www.cdc.gov/tb/publications/factsheets/pdf/xpertmtb-rifassayfactsheet_final.pdf. Accessed August 30, 2019.