Most Common Pathogens

Most Common Pathogens


Patients with no healthcare exposure or penetrating head trauma who acquired meningitis spontaneously in the community

  • Most common pathogens: Neisseria meningitidis, Streptococcus pneumoniae

Patients with prior neurosurgery, penetrating head trauma, cerebrospinal fluid shunts or drains, intrathecal infusion pumps, deep brain stimulation hardware

  • Increased risk of resistant gram-negative bacilli and staphylococci

Most commonly viral etiology, but can be bacterial

Neonates (< 1 month)

Age 2-50 years

Age > 50 years or Immunocompromised

Aerobic gram negative bacilli