neurotropic virus
Pronunciation: neuro-TROP-ic
A virus with specific affinity for nervous system tissue, often triggering immune-mediated CNS complications.
Full Definition
A neurotropic virus is a pathogen that exhibits specific affinity for nervous system tissue, including neurons, glial cells, and supporting structures. These viruses can directly infect CNS cells or trigger secondary immune-mediated damage through molecular mimicry and autoimmune responses. Common neurotropic viruses include herpes simplex virus, varicella-zoster virus, Epstein-Barr virus, and certain enteroviruses. In neuroimmunology, neurotropic viruses are important because they can initiate autoimmune cascades leading to conditions such as acute disseminated encephalomyelitis, Guillain-Barré syndrome, or post-infectious cerebellitis. The immune response to neurotropic viruses involves both innate and adaptive immunity, with potential for both protective and pathological outcomes depending on the balance of inflammatory and regulatory responses.
Usage
Usage note: Distinguish between direct viral CNS infection and immune-mediated post-viral complications.
In Context
- "The patient's encephalitis was attributed to a neurotropic virus based on CSF PCR results." — Clinical case report
- "Post-infectious autoimmune complications may follow neurotropic virus infections." — Medical review article