TABLE 3.

Fluoroquinolone activity against gram-negative respiratory tract pathogens from the Asia-Pacific region, 1999 to 2001

Organism	No. of strains	Antibiotic	MIC50a (μg/ml)	MIC90 (μg/ml)	% Susceptible at concn (μg/ml) of:
					0.06	0.12	0.25	0.5	1
H. influenzae	1,341	Garenoxacin	≤0.03	≤0.03	99	99	99	99	99
	1,341	Ciprofloxacin	≤0.03	≤0.25	84	85	99	99	99
	1,341	Levofloxacin	≤0.03	≤0.03	99	99	99	99	99
	1,341	Gatifloxacin	≤0.03	≤0.03	99	99	99	99	99
	819	Moxifloxacin	≤0.03	≤0.03	99	99	99	100	100
	745	Gemifloxacin	≤0.008	≤0.03	99	99	99	99	99
M. catarrhalis	600	Garenoxacin	0.03	0.03	99	99	99	100	100
	600	Ciprofloxacin	0.03	≤0.25	89	89	99	99	100
	600	Levofloxacin	≤0.03	0.06	99	99	99	99	100
	600	Gatifloxacin	≤0.03	≤0.03	99	99	99	100	100
	372	Moxifloxacin	0.06	0.06	99	99	99	99	100
	284	Gemifloxacin	≤0.008	≤0.03	99	100	100	100	100

^aMIC₅₀, MIC at which 50% of the isolates tested are inhibited.