Table 1 Susceptibility of 63 Corynebacterium striatum clinical isolates to 16 antimicrobial agents.

From: Occurrence of Corynebacterium striatum as an emerging antibiotic-resistant nosocomial pathogen in a Tunisian hospital

Antimicrobial agent

Range (mg/L)

MIC50

MIC90

Breakpoint

Resistant

Intermediate

Total (%) R

S

I

R

Amikacin

0.06–64

0.06

1

≤16

32

≥64

3

0

3 (4.8%)

Gentamicin

0.06–64

0.06

2

≤4

8

≥16

3

1

4 (6.3%)

Kanamicin

0.016–256

0.125

>64

≤16

32

≥64

10

1

11 (17.5%)

Tobramicin

0.06–64

0.06

8

≤4

8

≥16

3

4

7 (11.1%)

Streptomycin

0.125–64

2

>64

≤8

 

>16

8

2

10 (15.9%)

Erythromycin

0.06–64

0.5

8

≤0.5

1

≥2

24

6

30 (47.6%)

Clindamycin

0.06–64

1

>64

≤0.5

2

≥4

24

26

50 (79.4%)

Doxycicline

0.06–16

0.06

8

≤4

8

≥16

0

11

11 (17.5%)

Ciprofloxacin

0.015–16

0.125

>16

≤1

2

≥4

21

2

23 (36.5%)

Moxifloxacin

0.06–16

0.06

>16

≤0.5

1

≥2

15

7

22 (34.9%)

Penicillin

0.06–64

1

16

≤0.125

  

52

0

52 (82.5%)

Cefotaxime

0.25–256

2

16

≤1

2

≥4

28

10

38 (60.3%)

Rifampicin

0.015–64

0.015

16

≤1

2

≥4

14

2

16 (25.4%)

Vancomycin

0.06–1

0.25

0.25

≤2

  

0

0

0

Linezolid

0.015–1

0.25

0.5

≤4

 

≥8

0

0

0

Daptomycin

0.015–1

0.125

0.25

≤1

  

0

0

0

  1. Isolates were classified as resistant, intermediate, or susceptible, according to criteria defined by CLSI38.
  2. MIC, minimum inhibitory concentration; MIC50/90, MIC that inhibits 50% and 90% of the isolates, respectively.