JC Virus

**Definition:** A species of POLYOMAVIRUS, originally isolated from the brain of a patient with progressive multifocal leukoencephalopathy. The patient's initials J.C. gave the virus its name. Infection is not accompanied by any apparent illness but serious demyelinating disease can appear later, probably following reactivation of latent virus.

**Tree numbers:** - B04.280.210.700.615.400 - B04.613.204.670.615.400

**Synonyms:** - Polyomavirus hominis 2 - JC polyomavirus - Polyomavirus, JC - Human Polyomavirus JC - John Cunningham Virus