Table 4.

Resistance prevalence for selected drug-bug pairs by patient type, U.S. 1999–2002

unit: %
Pair	Bacterium (resistant to) → drug	ICU patients	non-ICU inpatients	Outpatients
A	PAE → Ciprofloxacin/ofloxacin	32	25	23
B	PAE → Levofloxacin	37	28	25
C	PAE → Imipenem	18	12	9
D	PAE → Ceftazidime	13	8	5
E	PAE → Piperacillin	16	11	6
F	SAU → Methicillin	47	38	23
G	Enterococcus spp → Vancomycin	13	11	4
H	ECO → Cef3*	1	1	0
I	ECO → Quinolone**	5	4	2
J	KPN → Cef3	6	5	2
K	Enterobacter spp → Cef3	26	21	10
L	Enterobacter spp → Carbapenum	1	1	1
M	CNS → Methicillin	75	63	46
N	Pneumococcus → Penicillin	18	17	17
O	Pneumococcus → Cef3	7	8	6
	Mean	21	17	12

*Cef3 (3^rd generation cephalosporin) = ceftazidime, cefotaxime or ceftriaxone;

**Quinolone = ciprofloxacin, ofloxacin or levofloxacin.