Skip to main content

Table 1 MIC values of 32 clinical E. cloacae complex isolates

From: Emergence of carbapenem-resistant and colistin-susceptible Enterobacter cloacae complex co-harboring blaIMP-1 and mcr-9 in Japan

Antimicrobial Agentsa

Breakpoint for resistance (μg/ml)

No. of resistant Isolates (%)

MIC data (μg/ml)

Range

MIC50

MIC90

Amikacin

≥64

0

0.5 to 4

1

2

Aztreonam

≥16

25 (78.1%)

< 0.25 to 256

32

256

Ceftazidime

≥16

32 (100%)

32 to > 512

256

> 512

Ciprofloxacin

≥4

15 (46.87%)

< 0.25 to 64

2

32

Colistinb

> 2

0

0.03 to 2

0.25

0.5

Imipenem

≥4

18 (56.25%)

< 0.25 to16

4

8

Meropenem

≥4

18 (56.25%)

0.5 to 16

4

16

Tigecyclineb

> 0.5

12 (37.5%)

< 0.25 to 4

0.5

1

  1. aBreakpoints for antimicrobial resistance were determined according to CLSI guidelines
  2. bBreakpoint for Colistin and Tigecycline was determined according to EUCAST guidelines