Table 3.

Comparison of antimicrobial resistance between A. baumannii strains producing and not producing only one type of β-lactamase (AmpC, ESBL, and KPC).

Antimicrobial Drug	AmpC-Producing N = 142 n (%)	AmpC-Non-Producing N = 91 n (%)	p	ESBL-Producing N = 27 n (%)	ESBL-Non-Producing N = 206 n (%)	p	KPC-Producing N = 179 n (%)	KPC-Non-Producing N = 54 n (%)	p
Ampicillin/sulbactam	117 (82.4)	83 (91.2)	0.600	19 (70.4)	181 (87.9)	0.014	154 (86.0)	46 (85.2)	0.875
Piperacillin/tazobactam	139 (97.9)	91 (100.0)	0.163	26 (96.3)	204 (99.0)	0.236	179 (100.0)	51 (94.4)	0.012
Ceftazidime	141 (99.3)	90 (98.9)	0.750	26 (96.3)	205 (99.5)	0.219	178 (99.4)	53 (98.1)	0.411
Cefepime	135 (95.1)	89 (97.8)	0.291	24 (88.9)	200 (97.1)	0.219	173 (96.6)	51 (94.4)	0.461
Imipenem	138 (97.2)	91 (100.0)	0.106	26 (96.3)	203 (98.5)	0.391	178 (99.4)	51 (94.4)	0.040
Meropenem	138 (97.2)	91 (100.0)	0.106	26 (96.3)	203 (98.5)	0.391	178 (99.4)	51 (94.4)	0.040
Ciprofloxacin	142 (100.0)	91 (100.0)	–	27 (100.0)	206 (100.0)	–	179 (100.0)	54 (100.0)	–
Gentamicin	113 (79.6)	87 (95.6)	<0.001	21 (77.8)	179 (86.9)	0.201	156 (87.2)	44 (81.5)	0.295
Tobramycin	128 (90.1)	89 (97.8)	0.031	27 (100.0)	190 (92.2)	0.133	165 (92.2)	52 (96.3)	0.294
Amikacin	107 (75.4)	85 (93.4)	<0.001	20 (74.1)	172 (83.5)	0.279	151 (84.4)	41 (75.9)	0.159
Tigecycline	122 (85.9)	57 (62.6)	<0.001	16 (59.3)	163 (79.1)	0.021	148 (82.7)	31 (57.4)	<0.001
Tetracycline	129 (90.8)	55 (60.4)	<0.001	21 (77.8)	163 (79.1)	0.872	152 (84.9)	32 (59.3)	<0.001
Doxycycline	122 (85.9)	19 (20.9)	<0.001	16 (59.3)	125 (60.7)	0.887	119 (66.5)	22 (40.7)	0.001
Trimethoprim/ Sulfamethoxazole	103 (72.5)	90 (98.9)	<0.001	22 (81.5)	171 (83.0)	0.790	143 (79.9)	50 (92.6)	0.038