Increasing Resistance of Coagulase-Negative Staphylococci in Total Hip Arthroplasty Infections: 278 THA-Revisions due to Infection Reported to the Norwegian Arthroplasty Register from 1993 to 2007

Table 3

Susceptibility to selected antibiotics, given as number of tested isolates susceptible to the given antibiotic/total number tested.

CoNS

S. aureus

Enterococci

Gram-negative

Streptococci

Time period (years)

93–97

98–02

03–07

93–97

98–02

03–07

93–97

98–02

03–07

93–97

98–02

03–07

93–97

98–02

03–07

Aminoglycosides

10/19

13/26

14/45

5/5

8/8

22/22

0/8

0/2

3/10

4/4

7/8

11/11

Methicillin group

12/28

15/33

10/62

10/10

15/15

37/37

Cephalosporins,; 3rd generation

2/3

6/6

6/7

Clindamycin

23/29

17/31

34/64

11/11

13/13

35/36

2/2

6/6

10/13

Quinolones

6/6

8/17

8/20

2/2

0/4

3/4

2/3

4/7

8/10

Carbapenems

3/3

4/5

8/8

Linezolid

3/3

38/38

11/11

1/1

10/10

Rifampicin

4/4

3/3

22/26

1/1

6/6

Fusidic acid

12/29

14/31

33/63

11/11

13/14

33/35

Macrolides

16/20

9/22

29/57

7/7

11/12

32/33

3/3

5/6

8/11

Cotrimoxazole

10/16

10/18

12/41

4/4

7/7

24/24

3/3

5/7

9/9

Ampicillin

9/9

3/4

20/20

1/4

4/9

1/10

Penicillin

5/5

8/8

15/15

Vancomycin

26/26

23/23

51/51

8/8

7/7

10/10

6/6

3/3

15/15

CoNS = coagulase-negative staphylococci.