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Table 3 Portal of entry in relation to microbial findings, location and source of brain abscess

From: Pyogenic brain abscess, a 15 year survey

  Portal of entry  
  Contiguous Haematogenous Postneurosurgical/trauma Unknown Total
  N=37 N=29 N=9 N=27 102
Microbe      
Streptococcus species 19 16 1 19 55
Staphylococci 4 5 5 2 16
Gram-negative bacteria 5 1 1 1 8
Anaerobic bacteria 6 3 2 3 14
Nocardia 1 1 0 0 2
Other 1 1 0 2 4
Negative culture 5 3 1 5 14
Abscess Location      
Frontal 15 8 6 8 37
Parietal 5 11 3 8 27
Temporal 8 4 0 2 14
Occipital 3 3 0 3 9
Pontine 0 3 0 0 3
Cerebellar 5 0 0 3 8
Basal ganglia 1 1 0 2 4
Multiple abscesses 3 11 3 4 21
Source of abscess      
Sinusitis 13     13
Dental 15     15
Otogenic 9     9
Lung   9    9
Endocarditis/congenital heart disease   4    4
Abdominal/urinary infection   4    4
Other   12    11
Postneurosurgical/trauma    9   9
Unknown     27 27