Table 4.

Rate of resistance of Gram-negative bacteria to antibiotic drugs (%)

Bacteria/yearAntibiotic	Pseudomonas aeruginosa			Acinetobacter baumannii			Klebsiella pneumoniae			Escherichia coli			Proteus mirabilis
	2011 (n=81)	2012 (n=59)	2013 (n=57)	2011 (n=60)	2012 (n=52)	2013 (n=57)	2011 (n=17)	2012 (n=28)	2013 (n=27)	2011 (n=21)	2012 (n=28)	2013 (n=30)	2011 (n=15)	2012 (n=13)	2013 (n=11)
Imipenem	70	17.2	41.8	89.7	84.6	82.5	41.2	32.1	63	0	7.1	3.3	0	60	88.9
Meropenem	64.5	18.2	36.5	83.8	62.5	80.4	33.3	21.7	54.2	0	0	0	0	8.3	0
Ertapenem	-	-	-	-	-	-	41.2	34.8	59.1	0	11.1	3.8	0	0	0
Amikacin	48.8	13.6	23.2	55.9	38.5	35.1	23.5	14.3	55.6	14.3	7.1	16.7	6.7	7.7	0
Gentamicin	55	20.3	46.4	86.4	80.8	75.4	35.3	60.7	63	66.7	71.4	63.3	46.7	23.1	18.2
Tobramycin	57.4	12.3	20	72.9	80.8	75.4	35.7	25	55.6	42.9	35.7	36.7	38.5	7.7	9.1
Ceftazidime	35.3	16.4	30.9	84.5	87	87.8	50	63	75	76.2	69.2	70.8	42.9	33.3	25
Ampicillin	100	100	100	100	100	100	100	100	100	94.4	92.9	93.3	66.7	46.2	36.4
Ampicillin/Sulbactam	97.2	96.4	100	89.1	84.8	93.3	58.8	59.3	80	78.9	69.2	100	30.8	50	-
Piperacillin/Tazobactam	64	22	46.3	89.7	84.3	82.5	41.2	35.7	63	15	3.6	13.3	6.7	0	0
Aztreonam	64.9	41.4	47.4	100	92.3	96.5	56.2	64.3	77.8	76.2	66.7	76.7	40	30.8	36.4
Levofloxacin	35.9	11.9	14	65	57.7	57.9	52.9	21.4	59.3	81	44.4	66.7	53.3	23.1	9.1
Ciprofloxacin	23.1	10.7	20	87.9	86.5	82.5	58.8	22.2	59.3	81	50	70	64.3	30.8	27.3
Polymyxin B	2.8	0	0	0	0	2	0	0	0	0	0	0	100	-	100
Tigecycline	-	-	-	-	-	-	-	0	-	-	0	-	-	-	-
Cefoperazone/Sulbactam	63.5	19.1	41.8	74.3	63	70.9	33.3	66.7	65.4	0	0	13.6	0	0	0
Cefuroxime	-	100	-	83.3	100	-	50	60	80	80	70	100	55.6	66.7	-
Cefepime	65	24.6	40.4	90	86.5	82.5	52.9	64.3	77.8	76.2	64.3	73.3	40	30.8	36.4
Cefotaxime	74.3	61.2	72.1	92.1	90.9	93.8	60	60	80	75	66.7	100	40	33.3	-
Cefatriaxone	73.1	60.3	68.4	95.6	98	84.2	58.3	65.2	77.8	75	66.7	69.8	40	30	36.4

(-) drug susceptibility was not performed.