TABLE 2.

Correlation of quinolone MICs with gyrA mutations for 105 Helicobacter pylori isolates

Agent	gyrA mutation	No. of isolates	MIC range	MIC50	MIC90
Sitafloxacin	Asn87	14	0.03-0.5	0.25	0.5
	Asp91	25	≤0.015-0.25	0.12	0.25
	Other	5	≤0.015-0.12
	None	61	≤0.015-0.06	0.03	0.03
Garenoxacin	Asn87	14	0.12-4	0.5	1
	Asp91	25	0.12-2	0.5	1
	Other	5	≤0.015-0.5
	None	61	≤0.015-0.25	0.03	0.06
Levofloxacin	Asn87	14	4-32	8	16
	Asp91	25	2-8	4	8
	Other	5	0.12-4
	None	61	0.12-2	0.25	0.25