“…The use of LDT PCR assays for the detection of Mtbc has been reported previously by numerous groups but, to our knowledge, none have been followed over a long period of time in order to collect actual performance data in a clinical diagnostic laboratory [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] . Some of the early LDTs were introduced as an alternative to the labor intensive and open PCR tests.…”