Table 2.

MICs of chlorhexidine and isopropanol by antibiotics

Antimicrobial agents	Chlorhexidine MIC (µg/mL)			p-value	Isopropanol MIC (mg/mL)			p-value
	MIC50	MIC90	Range		MIC50	MIC90	Range
Colistin
Sensitive	32	64	8–128	0.329	64	128	16–256	0.609
Resistant	32	32	8–32		80	128	32–128
Imipenem
Sensitive	32	64	8–128	0.105	64	128	32–128	0.675
Resistant	32	128	8–128		64	128	16–256
Meropenem
Sensitive	32	64	8–128	0.158	64	128	32–256	0.647
Resistant	32	128	8–128		64	128	16–256
PIP/TZB
Sensitive	32	64	8–128	0.165	64	128	32–128	0.815
Resistant	32	128	8–128		64	128	16–128
Chloramphenicol
Sensitive	32	128	8–128	0.183	32	128	16–256	0.101
Resistant	16	64	32–256		64	128	32–256
TMP/SMX
Sensitive	16	64	8–128	0.039‡	64	128	32–128	0.708
Resistant	32	128	8–128		64	128	16–256
Nitrofurantoin
Sensitive	32	64	8–64	0.875	48	128	16–128	0.610
Resistant	32	128	8–128		64	128	16–256
Aztreonam
Sensitive	32	64	8–128	0.598	32	128	32–256	0.510
Resistant	32	64	8–128		64	128	16–256
Ciprofloxacin
Sensitive	64	128	8–128	0.138	48	256	32–256	0.697
Resistant	32	64	8–128		64	128	16–256
Levofloxacin
Sensitive	32	128	8–128	0.059†	64	128	16–256	0.596
Resistant	16	64	8–128		64	128	32–128
Cefotaxime
Sensitive	32	128	8–128	0.979	64	128	32–256	0.991
Resistant	32	64	8–128		64	128	16–256
Ceftazidime
Sensitive	32	64	8–64	0.881	64	64	32–128	0.781
Resistant	32	128	8–128		64	128	16–256
AMC
Sensitive	16	64	8–128	0.266	64	256	32–256	0.199
Resistant	32	64	8–128		64	128	16–128
Gentamicin
Sensitive	32	64	8–128	0.115	64	128	32–256	0.586
Resistant	64	128	8–128		64	128	16–128
Amikacin
Sensitive	-			NA	-			NA
Resistant	32	64	8–128		64	128	16–256

MIC, Minimal Inhibitory Concentration; Me, Median; IQR, Interquartile range; Pip/tzb, piperacillin/tazobactam; TMP/SMX, trimethoprim/sulfamethoxazole; AMC, amoxicillin/clavulanate; †, p value <0.10; ‡, p value <0.05