Table 2.

The mutation frequency at 3 different loci of the rpoB gene in rifampinresistant M. tuberculosis isolated from North-East of Iran

Mutations				Samples			Total Percent
No mutation		None		37			42.046%
With Mutation	3 mutations		516+526+531		11	12.50%		12.50%	57.954%
			526+531		21	23.86%
	2 mutations		516+531		0	0.00%		24.996%
			516+526		1	1.136%
	1 mutation		531		17	19.31%		20.446%
			526		1	1.136%
			516		0	0.00%
Total					88			100%