Nosocomial outbreak of KPC-2- and NDM-1-producing Klebsiella pneumoniae in a neonatal ward: a retrospective study

Table 2 Antibiotic susceptibility of K. pneumoniae

Minimal inhibitory concentration (ug/ml)
Antibiotics	K. pneumoniaeST11 (n = 25)	NDM-1positiveK.pneumoniae (n = 7)
	range	range
AMP	≥512	≥512
CAZ	≥512	≥512
CTX	128- > 512	64- > 512
FOX	64–256	64–256
FEP	64–256	16–64
CXM	≥512	≥512
ATM	≥512	1–2
GN	64–256	0.25–0.5
LEV	32–128	0.06–0.25
AK	≥512	1–2
CIP	≥32	0.06–1
TZP	64/4- > 256/4	128/4- > 256/4
SXT	1/19–2/38	≥256/4864
IPM	8–64	1–16
MEM	4–32	1–32
TGC	0.06–0.5	0.06–0.5
CO	0.03–0.5	0.06–0.25

AMP ampicillin (0.06–512), CAZ ceftazidime (0.06–512), CTX cefotaxime (0.06–512), FEP cefepime (0.06–512), CXM cefuroxime (0.06–512), FOX cefoxitin (0.06–512), GN gentamicin (0.06–512), LEV levofloxacin (0.06–512), AK amikacin (0.06–512), CIP ciprofloxacin (0.004-32), ATM Aztreonam (0.06–512), IPM imipenem (0.03–256), MEM meropenem (0.03–256), TZP piperacillin-tazobactam (0.25/4–256/4), SXT trimethoprim-sulfamethoxazole (0.25/4.75–256/4864), TGC tigecycline (0.03–256), CO colistin (0.03–256)

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