TABLE 1.

Distribution of erythromycin and clarithromycin MICs for the mutations observed

Mutation	No. of strains	Erythromycin MIC (μg/ml)	Clarithromycin MIC (μg/ml)
A2142C	2	>256	>256
A2142G	10	>256	>256
A2143G	7	>256	>256
	1	>256	256
	2	>256	128
	3	>256	64
	4	>256	32
	3	>256	16
	2	>256	8
	1	>256	4
	2	>256	2
	2	>256	1
	1	>256	0.5
	2	>256	0.016
Wild-type sequence	1	0.5	<0.016
	2	0.25	<0.016
	1	0.125	0.023
	6	0.125	<0.016
	4	0.06	<0.016
	9	0.032	<0.016
	4	0.016	<0.016
	2	<0.016	<0.016