Table 4 Bacterial pathogens

Streptococcus species

55

54%

Streptococcus milleri group

32

Streptococcus oralis/sanguis

3

Group A streptococcus

1

Streptococcus pneumoniae

4

Streptococcus bovis

1

Streptococcus species

14

Staphylococci

16

15%

Staphylococcus aureus

14

Coagulase-negative staphylococci

2

Gram-negative bacteria

8

8%

E.coli

2

Haemophilus spp.

5

Pseudomonas

1

Anaerobic bacteria

17

17%

Fusobacteria

4

Actinomyces

2

Prevotella

2

Peptostreptococci

2

Other anerobic bacteria

7

Nocardia

2

2%

Other species

4

4%

Negative culture, n= patients

14

14%

Mixed bacterial pathogens

11

11%

Primary microscopy compatible with several different bacterial species

23

23%

Positive gram-stain from pus/CSF

64

64%

Gram-stain positive/negative culture

4/65

Negative gram-stain and positive culture

18

Negative culture from brain pus

7