Causative pathogens of 205 patients with bacterial brain abscesses
| With seizures | Without seizures | ||
| Early seizures | Late seizures* | ||
| N=27 | N=21 | N=157 | |
| Gram-negative bacilli (N=49) | |||
| Klebsiella pneumoniae | 3 | 4 | 19 |
| Other gram-negative bacilli | 5 | 3 | 15 |
| Streptococcus species (N=42) | |||
| Viridans streptococci | 2 | 3 | 30 |
| Other Streptococci | 1 | 0 | 6 |
| Anaerobic pathogens (N=37) | 3 | 4 | 30 |
| Staphylococcus species (N=20) | |||
| Staphylococcus aureus | 1 | 2 | 8 |
| Other Staphylococcus species | 2 | 1 | 6 |
| Mixed bacterial pathogens (N=18) | 2 | 2 | 14 |
| Negative culture (N=66) | 10 | 6 | 50 |
↵* Thirteen patients had unprovoked seizures after discharge.