Table 3. Colony forming unit and IS6110 detection by two qPCR instruments using 1:10 dilutions of a M. tuberculosis cell suspension.

UNC means “uncountable”.

Diluiton	Average (CFU/mL)	Step One (± SD)	Q3 Plus (± SD)
1:10	UNC	23.7 ± 0.9	25.7 ± 2.1
1:100	175 ± 35.3	29.4 ± 0.7	27.9 ± 0.4
1:1.000	35.5 ± 6.3	31.5 ± 0.1	29.2 ± 0.8
1:10.000	9.5 ± 6.3	33.3 ± 1.1	32.1 ± 0.7
1:100.000	0.5 ± 0.7	36.1 ± 1.1	36.5 ± 1.4