TABLE 3.

Analysis of strains showing discordant DST results between the conventional proportion and broth microdilution MIC methods

Discordancya	Mutation status	No. of isolates (%)	No. of isolates with MIC (μg/ml) of:
			0.5	1	2	4	8	16	32	>32
Type I (R by proportion method, S by MIC method)	With mutation	8 (26.7)	1		4	3
	Without mutation	22 (73.3)		5	9	8
	Total	30 (100.0)	1	5	13	11
Type II (S by proportion method, R by MIC method)	With mutation	9 (90.0)					6	1	1	1
	Without mutation	1 (10.0)					1
	Total	10 (100.0)					7	1	1	1

^aR, resistant; S, susceptible.