Utility of MPT64 antigen test for differentiating mycobacteria: Can correlation with liquid culture smear morphology add further value?

Correlation of MPT64 ICT results with liquid culture smear was useful, especially in MPT64 ICT negative isolates, where the latter could help to determine need and/or type of additional confirmatory testing. Liquid culture smear, however, lacked specificity and cannot be used as a stand alone test.