A prospective multicenter study on the evaluation of antimicrobial resistance and molecular epidemiology of multidrug-resistant Acinetobacter baumannii infections in intensive care units with clinical and environmental features

Table 3 Antimicrobial susceptibility of invasive MDR A. baumannii isolates from ICUs (n = 172)

Antimicrobial agent	MIC₅₀ (mg/L)	MIC₉₀ (mg/L)	MIC range (mg/L)	Resistance (%)
Amikacin	≥ 256	≥ 256	1 to ≥ 256	91.8
Ampicillin–sulbactam	256	≥ 256	32 to ≥ 256	99.4
Ceftazidime	256	≥ 256	16 to ≥ 256	99.4
Ciprofloxacin	128	≥ 256	8 to ≥ 256	100
Imipenem	64	128	1 to ≥ 256	99.4
Colistin	0.5	1.0	0.25–64	1.2
Tigecycline	1.0	2.0	0.01–3	1.7

ISSN: 1476-0711