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Table 2 Antimicrobial susceptibility of major antibiotics against Bacillus cereus

From: Clinical characteristics and antimicrobial susceptibility of Bacillus cereus blood stream infections

Antimicrobial agent

n

MICa (mg/dL)

Interpretation n (%)

Range

50 %b

90 %b

Susceptible

Interpretive

Resistant

Vancomycin

29

≤2

≤2

≤2

29 (100)

0

0

Imipenem

29

≤0.5 to 4

≤0.5

≤0.5

29 (100)

0

0

Gentamicin

29

≤2 to 4

≤2

4

29 (100)

0

0

Amikacin

26

≤16

≤16

≤16

26 (100)

0

0

Linezolid

25

≤0.25 to 2

1

1

25 (100)

  

Chloramphenicol

22

2 to 4

4

4

22 (100)

0

0

Rifampin

15

≤1

≤1

≤1

15 (100)

0

0

Levofloxacin

29

≤0.12 to >16

≤0.5

≤0.5

26 (89.7)

1 (3.4)

2 (6.9)

Clindamycin

29

<0.25 to ≥4

2

2

10 (34.5)

18 (62.1)

1 (3.4)

Erythromycin

29

≤0.25 to >16

0.5

1

18 (62.1)

6 (20.7)

2 (6.9)

Cefazolin

29

≤8 to ≥64

≤8

 

15 (51.7)

6 (20.7)

8 (27.6)

Daptomycin

22

≤0.12 to 4

2

4

8 (36.4)

12 (54.5)c

 

Cefotaxime

22

4 to ≥64

16

32

2 (9.1)

18 (81.8)

2 (9.1)

Ampicillin/sulbactam

25

≤0.25 to >8

4

>8

1 (4)

24 (96)

Ampicillin

29

0.5 to >8

>4

>4

0

29 (100)

Ceftazidime

22

32 to >64

>64

>64

0

0

22 (100)

  1. aMinimum inhibitory concentration
  2. bMIC at which 50 or 90 % of tested isolates are inhibited
  3. cThis isolates were interpreted as “not susceptible” because the breakpoint was only set for susceptible