Herpes simplex encephalitis

Encephalitis associated with herpes simplex virus

Herpes simplex encephalitis (HSE), or simply herpes encephalitis, is a rare form of encephalitis caused by the herpes simplex virus. It is estimated to affect at least 1 in 500,000 individuals per year, and some studies suggest an incidence rate of 5.9 cases per 100,000 live births. About 90% of cases of herpes encephalitis are caused by herpes simplex virus-1 (HSV-1), the same virus that causes cold sores.

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