Table 2.

Percentage Resistance of Gram-Negative Bacteria to Selected Antibiotics from Respiratory and Non-Respiratory Specimen

Antibiotic Class	Antibiotic Agent	kpn		aba		eco		pae		ecl		sma
		n	%R	n	%R	n	%R	n	%R	n	%R	n	%R
β-lactam combination	Ampicillin-Sulbactam	148	24	134	82	69	60	65	100	34	100	12	100
β-lactam combination	Piperacillin-tazobactam	148	9	134	88	69	5	65	15	34	0	12	0
Cephalosporin	Cefotaxime	148	25	134	–	69	73	65	–	34	22	12	25
Cephalosporin	Ceftriaxone	148	25	134	81	69	75	65	–	34	35	12	22
Cephalosporin	Ceftazidime	148	21	134	84	69	29	65	17	34	18	12	22
Cephalosporin	Cefepime	148	11	134	87	69	22	65	15	34	5	12	0
Aminoglycoside	Amikacin	148	6	134	44	69	0	65	15	34	0	12	0
Aminoglycoside	Gentamicin	148	19	134	82	69	37	65	18	34	18	12	22
Fluoroquinolone	Ciprofloxacin	148	29	134	86	69	77	65	20	34	25	12	22
Monobactam	Aztreonam	148	32	134	–	69	63	65	21	34	22	12	22
Folate pathway antagonist	Trimethoprim-sulfamethoxazole	148	27	134	57	69	58	65	–	34	31	12	0
Carbapenem	Meropenem	148	10	134	85	69	2	65	13	34	6	12	0

Abbreviations: aba, Acinetobacter baumannii; ecl, Enterobacter cloacae; eco, Escherichia coli; kpn, Klebsiella pneumoniae; pae, Pseudomonas aeruginosa; sma, Serratia marcescens; n, number of isolates tested to a certain antibiotic agent; %R, percentage of antibiotic resistance; (-) dash, not tested.