Table 1 Effect of antibiotic on gain and loss of resistance in Enterobacteriaceae after 72 h in ICU

Timentin and/or gentamicin

Cefepime

15

7

22

17

APP-β

14

6

45^c

13

None

13

3

43^a

8

p = 0.610

p = 0.34

p = 0.004^a

p = 0.07

Timentin

Cefepime

15

8

22

16

APP-β

14

6

45^a

13

None

12

3

44^a

8

p = 0.550

p = 0.20

p = 0.002^a

p = 0.10

Gentamicin

Cefepime

8

7

39

7

APP-β

6

8

62^a

2

None

5

2

57^a

3

p = 0.456

p = 0.16

p = 0.014^a

p = 0.06