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M. Tuberculosis culture

  • Culture for M. tuberculosis confirms a TB diagnosis and is the most sensitive diagnostic method.(Ref.)

  • Both solid and liquid cultures can be used. Liquid cultures deliver quicker results (10-14 days vs. 2-3 months) and have higher sensitivity. However, they are more costly and require a higher degree of laboratory capability.

  • All culture testing is performed by specialized TB laboratories and may not be available in all areas. Request cultures for patients with negative smear and Xpert MTB/RIF results and a strong suspicion of TB; however, treatment should not be deferred while waiting for the results.
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