Abstract
Identification of the Mycobacterium tuberculosis complex (MTBC) from culture and differentiation from other non-tuberculous mycobacterial species is required for rapid diagnosis and accurate treatment. However, gaps exist in culture-based identification of acid-fast bacilli (AFB) positive cultures for rapid rule-out of MTBC in the United States. The SD Bioline™ MPT64 (Abbott Inc, South Korea) lateral flow assay (LFA) has high sensitivity and specificity for the detection of MTBC in liquid culture but has not been evaluated in a clinical mycobacteriology laboratory in the United States. We conducted a diagnostic accuracy study of this LFA for detection of MTBC versus NTMs on AFB positive cultures. A total of 362 tests were performed, with a sensitivity and specificity of 100 % (362/362) across all tests. The SD Bioline MPT64 assay provides accurate test results with AFB-positive liquid cultures and could fill the current gap for rapid rule-out of MTBC in U.S.-based clinical laboratories.
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