TABLE 2.

MICs for H. influenzae isolated from CF patients, as determined by the Epsilon test

Antibiotic	No. of isolatesa	MIC rangeb	MIC50b	MIC90b	Geometric mean
Ampicillin	188	0.064-256	0.50	64	0.88
	115	0.064-256	0.25	64	0.82
Amoxicillin-clavulanic acid	188	0.064-8	0.5	2	0.55
	115	0.064-4	0.5	2	0.47
Cefotaxime	188	0.003-2	0.23	0.125	0.03
	115	0.003-1	0.016	0.06	0.02
Chloramphenicol	188	0.125-16	0.5	8	0.70
	115	0.125-16	0.5	1.0	0.53
Cotrimoxazole	188	0.012-64	4	64	1.8
	115	0.012-64	4	32	0.90
Ciprofloxacin	188	0.003-64	0.012	4	0.04
	115	0.003-32	0.012	0.025	0.01

^aTwo values are specified: 188 is the total number of isolates, and 115 is the number of PFGE patterns.

^bExpressed in micrograms/milliliter.