TABLE 8.

Ranges and mean percentages of susceptible isolates for all methods based on NCCLS and PK-PD breakpoints

Antimicrobial agent	NCCLS			PK-PD
	Susceptible breakpoint (μg/ml)	% Susceptible range	% Susceptible mean	Susceptible breakpoint (μg/ml)	% Susceptible range	% Susceptible mean
Amoxicillin-clavulanic acida	4	89.0-99.0	96.9	2	75.0-96.0	85.7
Amoxicillin	NAb	NA	NA	2	41-57	49.3
Ampicillin	1	44.0-57.0	50.3	NA	NA	NA
Azithromycin	4	All at 100	100	0.12	0.0-6.0	2.2
Cefaclor	8	47.0-90.0	67.7	0.5	0.0-3.0	0.78
Cefdinir	1	79.0-100.0	93.5	0.5	61.0-87.9	74.2
Cefixime	1	All at 100	100	1	All at 100	100
Cefprozil	8	52.0-91.0	73.2	1	1.0-27.0	13.2
Ceftriaxone	2	All at 100	100	NA	NA	NA
Cefuroxime	4	83.0-99.0	93.8	1	47.0-75.8	62.7
Chloramphenicol	2	92.9-93.0	93.0	NA	NA	NA
Ciprofloxacin	1	All at 100	100	1	All at 100	100
Clarithromycin	8	77.0-96.0	90.3	0.25	All at 0	0
Doxycycline	NA	NA	NA	0.25	78.0-89.0	80.9
Erythromycin	NA	NA	NA	0.25	All at 0	0
Gemifloxacin	NA	NA	NA	1	All at 100	100
Grepafloxacin	0.5	All at 100	100	1	All at 100	100
Levofloxacin	2	All at 100	100	1	All at 100	100
Ofloxacin	2	All at 100	100	1	All at 100	100
Trim./Sulfa.c	0.5	71.0-82.0	76.0	NA	NA	NA
Trovafloxacin	1	All at 100	100	1	All at 100	100

^aBreakpoints shown as amoxicillin component.

^bNA, not applicable.

^cTrim./Sulfa., trimethoprim-sulfamethoxazole.