Infectious (Meningitis → Encephalitis)

• Enteroviruses (e.g., Coxsackievirus, Echovirus) – most frequent in children
• HSV 1/2 (HSV-2) – especially in adults
• VZV (HHV3)
• EBV (HHV 4)
• Arboviruses (e.g., West nile virus )
• Traveller or East Asian South Asian : suspect…
  • Rabies
  • JEV
• Other
  • HIV Infection (especially during seroconversion)
  • Mumps virus (in unvaccinated individuals)
  • Lyme Disease

Herpes Encephalitis

HSV 1/2

In Newborn:

• Fever in Newborn (Neonatal Infections), Decreased LOC, !Seizure

Mumps Encephalitis

Mumps

Toxoplasmosis

Ring Enhancing Lesion