Molecular and phenotypic characterization of clinical isolates belonging to a KPC-2-producing strain of ST15 Klebsiella pneumoniae from a Vietnamese pediatric hospital

Table 3 Antimicrobial susceptibility pattern of 57 isolates of carbapenem-resistant ST15 K. pneumoniae isolated at a large Vietnamese pediatric hospital

Antimicrobial agent	S ≤ (mg/L)	R > (mg/L)	S (%)	R (%)	MIC₅₀ (mg/L)	MIC₉₀ (mg/L)
Gentamicin	2	4	91	8.8	1.5	2
Tobramycin	2	4	0	100	16	24
Amikacin	8	16	0	96	32	64
Chloramphenicol	8	8	3.5	96	128	> 256
Trimethoprim/sulfamethoxazole	2	4	70	25	2	> 32
Ciprofloxacin	0.25	0.5	0	100	> 32	> 32
Cefotaxime	1	2	0	100	> 32	> 32
Imipenem	2	8	0	96	> 32	> 32
Meropenem	2	8	0	100	> 32	> 32
Ertapenem	0.5	1	0	100	> 32	> 32
Tigecycline	1	2	82	7.0	0.5	2
Fosfomycin	32	32	70	30	16	> 1024
Ceftazidime/avibactam	8	8	96	3.5	2	3
Colistin	2	2	58	42	0.5	32

ISSN: 2047-2994