Bacterial Pathogens and Risk/Predisposing Factors
Table. Bacterial Pathogens and Risk or Predisposing Factors [1, 2] (Open Table in a new window)
| Risk and/or Predisposing Factor | Bacterial Pathogen |
| Age 18-50 y | Streptococcus pneumoniae, Neisseria meningitidis |
| Age >50 y | S pneumoniae, N meningitidis, Listeria monocytogenes, aerobic gram-negative bacilli |
| Immunocompromised state | S pneumoniae, N meningitidis, L monocytogenes, aerobic gram-negative bacilli |
| Postneurosurgery | Aerobic gram-negative bacilli (including Pseudomonas aeruginosa), Staphylococcus aureus, coagulase-negative staphylococci (especially Staphylococcus epidermidis) |
| Basilar skull fracture | S pneumoniae, Haemophilus influenzae, group A β-hemolytic streptococci |
| Cerebrospinal fluid shunt | Coagulase-negative staphylococci (especially S epidermidis), S aureus, aerobic gram-negative bacilli, Propionibacterium acnes |
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| Risk and/or Predisposing Factor | Bacterial Pathogen |
| Age 18-50 y | Streptococcus pneumoniae, Neisseria meningitidis |
| Age >50 y | S pneumoniae, N meningitidis, Listeria monocytogenes, aerobic gram-negative bacilli |
| Immunocompromised state | S pneumoniae, N meningitidis, L monocytogenes, aerobic gram-negative bacilli |
| Postneurosurgery | Aerobic gram-negative bacilli (including Pseudomonas aeruginosa), Staphylococcus aureus, coagulase-negative staphylococci (especially Staphylococcus epidermidis) |
| Basilar skull fracture | S pneumoniae, Haemophilus influenzae, group A β-hemolytic streptococci |
| Cerebrospinal fluid shunt | Coagulase-negative staphylococci (especially S epidermidis), S aureus, aerobic gram-negative bacilli, Propionibacterium acnes |
