Table 3 Comparison of the in vitro activities of selected antimicrobial agents tested against Pseudomonas aeruginosa (404 strains)

 Ceftazidime

2

>16

≤1 – >16

71.7 / 24.0

 Cefepime

4

16

0.5 – >16

77.9 / 9.9

 Piperacillin/tazobactam^b 

8

>64

≤0.5 – >64

68.8 / 15.5

 Imipenem

2

>8

≤0.12 – >8

74.9 / 17.8

 Meropenem

0.5

>8

≤0.12 – >8

76.4 / 12.8

 Ciprofloxacin

0.25

>4

≤0.03 – >4

75.2 / 20.0

 Levofloxacin

≤0.5

>4

≤0.5 – >4

74.2 / 24.0

 Gentamicin

≤2

>8

≤2 – >8

64.1 / 31.9

 Amikacin

4

>32

≤4 – >32

70.3 / 23.7

 PolymyxinB 

1

1

≤0.5 – 2

100.0 / 0.0

 Colistin

1

2

≤0.5 – 2

100.0 / 0.0