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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