Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Encephalitis is an inflammation of the brain usually caused by a viral infection. It can lead to symptoms such as headache, fever, confusion, and even seizures.
Related terms
Meningoencephalitis: This term refers to inflammation affecting both the brain (encephalitis) and the protective membranes covering it (meningitis).
Arboviruses: These are viruses transmitted by arthropods (such as mosquitoes or ticks) that can cause encephalitis.
Herpes Simplex Virus (HSV): HSV is one of the common viruses that can cause encephalitis.