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Table 4 Data on antimicrobial resistance patterns and respective MIC90 of isolated bacteria.

From: Secular trends of antimicrobial resistance of blood isolates in a newly founded Greek hospital

 

2002

2003

2004

2005

Microorganisms

S*

I**

R***

MIC90 #

S

I

R

MIC90

S

I

R

MIC90

S

I

R

MIC90

Gram-positive

                

Staphylococcus epidermidis

                

Oxacillin

31/202

0/202

171/202

4

46/261

0/261

215/261

4

36/214

0/214

179/214

4

15/94

0/94

75/94

4

Gentamicin

58/202

18/202

126/202

16

87/261

20/261

154/261

16

71/219

0/219

148/219

16

40/94

10/94

44/94

16

Vancomycin

202/202

0/202

0/202

2

261/261

0/261

0/261

2

219/219

0/219

0/219

2

94/94

0/94

0/94

4

Staphylococcus aureus

                

Oxacillin

13/38

0/38

25/38

4

9/30

0/30

21/30

4

13/25

0/25

12/25

4

2/8

0/8

6/8

4

Gentamicin

16/38

13/38

9/38

8

21/30

5/30

4/30

8

19/25

0/25

6/25

4

5/8

1/8

2/8

0.5

Vancomycin

38/38

0/38

0/38

1

30/30

0/30

0/30

2

25/25

0/25

0/25

1

8/8

0/8

0/8

1

Enterococcus faecalis

                

Vancomycin

14/14

0/14

0/14

2

17/19

0/19

2/19

2

6/6

0/6

0/6

2

4/4

0/4

0/4

2

Enterococcus faecium

                

Vancomycin

13/14

0/14

1/14

1

8/8

0/8

0/8

1

2/2

0/2

0/2

32

2/2

0/2

0/2

1

Gram negative

                

Acinetobacter baumannii

                

Amikacin

3/9

1/9

5/9

64

5/15

0/15

10/15

64

3/35

2/35

30/35

64

2/17

2/17

13/17

64

Ceftazidime

1/9

2/9

6/9

64

2/15

1/15

12/15

64

1/35

0/35

34/35

64

0/17

0/17

17/17

64

Ciprofloxacin

3/9

0/9

6/9

4

3/15

0/15

12/15

4

1/35

0/35

34/35

4

0/17

0/17

17/17

4

Colistin

8/9

0/9

1/9

2

15/15

0/15

0/15

1

35/35

0/35

0/35

2

16/17

0/17

1/17

0.5

Gentamicin

5/9

0/9

4/9

16

5/15

5/15

5/15

16

19/35

6/35

10/35

16

5/17

4/17

8/17

16

Imipenem

5/9

2/9

2/9

16

6/15

4/15

5/15

16

1/35

5/35

29/35

16

0/17

4/17

13/17

16

Piperacillin/Tazobactam

2/9

1/9

6/9

128

4/15

1/15

10/15

128

1/35

1/35

33/35

128

0/17

3/17

14/17

128

Pseudomonas aeruginosa

                

Amikacin

15/29

2/29

12/29

64

18/33

1/33

14/33

64

8/25

0/25

17/25

64

7/11

0/11

4/11

64

Ceftazidime

13/29

2/29

15/29

64

14/33

5/33

14/33

64

4/25

7/25

14/25

64

3/11

1/11

7/11

64

Ciprofloxacin

11/29

0/29

18/29

4

14/33

0/33

19/33

4

8/25

0/25

17/25

4

6/11

0/11

5/11

4

Colistin

29/29

0/29

0/29

2

33/33

0/33

0/33

2

25/25

0/25

0/25

2

11/11

0/11

0/11

2

Imipenem

11/29

14/29

4/29

16

19/33

9/33

5/33

16

10/25

6/25

9/25

16

6/11

4/11

1/11

16

Piperacillin/Tazobactam

26/29

0/29

3/29

64

26/33

1/33

6/33

128

7/25

11/25

7/25

128

9/11

0/11

2/11

128

Klebsiella pneumoniae

                

Ceftazidime

5/7

0/7

2/7

64

23/34

0/34

11/34

64

14/29

1/29

14/29

64

2/11

0/11

9/11

64

Ciprofloxacin

6/7

0/7

1/7

1

22/34

1/34

11/34

4

13/29

0/29

16/29

4

7/11

0/11

4/11

4

Meropenem

7/7

0/7

0/7

0.25

33/34

0/34

1/34

0.5

21/29

4/29

4/29

8

2/11

1/11

8/11

16

Cefepime

7/7

0/7

0/7

2

23/34

1/34

10/34

64

14/29

7/29

8/29

64

2/11

0/11

9/11

64

Cefoxitin

7/7

0/7

0/7

4

24/34

0/34

10/34

64

11/29

0/29

18/29

64

2/11

0/11

9/11

64

Tobramycin

7/7

0/7

0/7

1

26/34

0/34

8/34

16

12/29

1/29

16/29

16

2/11

2/11

7/11

16

Piperacillin/Tazobactam

7/7

0/7

0/7

8

26/34

1/34

7/34

128

14/29

2/29

13/29

128

2/11

0/11

9/11

128

Escherichia coli

                

Amikacin

35/35

0/35

0/35

2

57/57

0/57

0/57

2

43/47

4/47

0/47

4

29/30

0/30

1/30

4

Ciprofloxacin

28/35

0/35

7/35

4

54/57

0/57

3/57

0.5

43/47

0/47

4/47

4

21/30

0/30

9/30

4

Piperacillin/Tazobactam

34/35

0/35

1/35

4

56/57

1/57

0/57

4

43/47

1/47

3/47

8

28/30

1/30

1/30

4

Ceftazidime

33/35

0/35

2/35

2

57/57

0/57

0/57

1

43/47

3/47

1/47

1

25/30

0/30

5/30

2

Cefoxitin

31/35

1/35

3/35

16

56/57

1/57

0/57

4

43/47

4/47

0/47

4

26/30

1/30

3/30

16

Meropenem

34/35

1/35

0/35

0.25

57/57

0/57

0/57

0.25

46/47

0/47

1/47

0.25

30/30

0/30

0/30

2

  1. Abbreviations: *S = susceptible, **I = intermediate, ***R = resistant, # MIC 90 = minimum inhibitory concentration for 90% of the corresponding microbial population
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BMC Infectious Diseases

ISSN: 1471-2334

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