TABLE 2.

MICs of fluoroquinolones and other drugs for S. enterica serovar Typhi strains resistant or susceptible to nalidixic acid

Drugs	MIC (μg/ml)
	Resistant strains (n = 10)			Susceptible strains (n = 52)
	Range	50%	90%	Range	50%	90%
Ciprofloxacin	0.125–0.5	0.25	0.5	0.008–0.031	0.016	0.031
Ofloxacin	0.5–1.0	0.5	1.0	0.031–0.25	0.063	0.25
Norfloxacin	0.5–2.0	1.0	2.0	0.031–0.25	0.063	0.25
Levofloxacin	0.25–0.5	0.25	0.5	0.031–0.25	0.063	0.125
Tosufloxacin	0.016–0.25	0.125	0.25	0.004–0.25	0.016	0.016
Sparfloxacin	0.016–0.25	0.25	0.25	0.008–0.25	0.016	0.016
Cefoperazone	0.25–8.0	0.5	4.0	0.031–4.0	0.25	2.0
Ceftriaxone	0.031–0.063	0.063	0.063	0.016–0.063	0.031	0.063
Cefotaxime	0.031–0.063	0.063	0.063	0.031–0.125	0.063	0.063