Skip to main content

Table 2 MIC ranges, MIC50 and MIC90 values based on outbreak

From: Molecular characterization and antimicrobial susceptibility of Acinetobacter baumannii isolates obtained from two hospital outbreaks in Los Angeles County, California, USA

Outbreak

Antimicrobial agents

MIC, μg/ml

range

MIC50

MIC90

Outbreak X (n = 26)

Amikacin

1–256

256

256

Gentamicin

4–256

256

256

Tobramycin

0.5–256

256

256

Imipenem

2–32

16

32

Meropenem

8–64

32

64

Piperacillin

256

256

256

Cefepime

64–256

128

256

Cefotaxime

256

256

256

Ceftazidime

256

256

256

Ceftriaxone

256

256

256

Ciprofloxacin

64–256

256

256

Gatifloxacin

4–64

32

64

Levofloxacin

16–32

32

32

Polymyxin B

0.25–0.5

0.25

0.5

Outbreak Y (n = 12)

Amikacin

256

256

256

Gentamicin

256

256

256

Tobramycin

256

256

256

Imipenem

1–32

32

32

Meropenem

2–32

32

32

Piperacillin

256

256

256

Cefepime

32

32

32

Cefotaxime

256

256

256

Ceftazidime

128–256

256

256

Ceftriaxone

256

256

256

Ciprofloxacin

64–128

128

128

Gatifloxacin

8–64

16

32

Levofloxacin

16–64

32

64

Polymyxin B

0.25

0.25

0.25