Table 2. Viable cells (concentration and percentage) of M. tuberculosis before and after competition assay between resistant and susceptible strains with the same genotype family.

	Profile of susceptibility	Genotype	Strain	Before competition		After competition		Number of Generation (n)
				CFU/mL	%	CFU/mL	%
Test 1	MDR	W-Beijing	03-0265	3.86×104	9.5%	5.2×105	0.5%	3.8
	S	W-Beijing	02-2761	3.68×105	90.5%	10.7×107	99.5%	8.2
Test 2	MDR	Non-W-Beijing	03-0850	2.23×104	7.0%	5.2×107	82%	11.2
	S	Non-W-Beijing	01-2522	2.97×105	93%	1.11×107	18%	5.2
Test 3	MDR	W-Beijing	03-0265	3.86×104	63.38%	6.60×106	1.57%	7.4
	MDR	Non-W-Beijing	03-0850	2.23×104	36.32%	4.13×108	98.43%	14.2
Test 4	S	W-Beijing	02-2761	3.68×105	55.34%	1.11×109	98.82%	11.6
	S	Non-W-Beijing	01-2522	2.97×105	44.66%	1.32×107	1.17%	5.5

S: susceptible to first and second-line drugs tested; MDR: multidrug resistant strain.