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Numbers are percent susceptible

Gram Negative Organisms	No.of isolates	amk	am/s	cz	fep	caz	cx	esbl (+)	etp	gm	le	nit	pip/ taz	tmp/ smx
Acinetobacter baumannii	43	-	77	-	43	23	-	-	-	61	27	-	-	30
Citrobacter freundii	55	100	-	0	100	78	87	-	98	93	84	89	-	71
Citrobacter koseri	50	100	-	92	100	96	100	-	100	100	64	54	-	68
Enterobacter aerogenes	43	100	-	0	100	77	79	-	98	93	86	7	-	93
Enterobacter cloacae	128	100	-	0	94	53	58	-	84	89	62	18	-	66
Escherichia coli	3152	100	45	80	88	86	87	12	100	80	41	89	-	54
Klebsiella oxytoca	57	100	84	81	100	100	98	2	100	100	96	63	-	95
Klebsiella pneumoniae	653	99	85	89	92	90	91	8	100	96	93	25	-	88
Morganella morganii	96	99	0	0	92	60	90	-	100	75	41	0	-	30
Proteus mirabilis	1144	100	66	86	97	97	97	-	100	76	28	0	-	36
Providencia stuartii	115	99	0	0	99	96	99	-	-	47	11	0	-	42
Pseudomonas aeruginosa	488	95	-	-	74	75	-	-	-	65	42	-	78	-
Serratia marcescens	31	100	0	0	100	94	97	-	100	91	88	0	-	91
Stenotrophomonas maltophilia	19*	-	-	-	-	-	-	-	-	-	74	-	-	100

*NO. of isolates-“Percent susceptible for each organism/antimicrobial combination was generated by including the first isolate of that organism recovered from a given patient.” When fewer that 30 isolates are reported it should be noted that less than statistical validity of the estimates of percent susceptibility exist.

Abbreviation Key: amk- amikacin, am/s-ampicillin/sulbactam, cz-cefazolin, fep- cefepime, caz-ceftazidime,

cx-ceftriaxone, Esbl-Extended Spectrum Beta Lactamase, etp-ertapenem, gm-gentamicin, le-levofloxacin,

nit-nitrofurantoin, pip/taz-piperacillin/tazobactam, tmp.smx-trimethoprim/sulfa

- antibiotics not tested or not recommended due to lack of correlation between in vitro results and in vivo activity.