Tick-borne viral encephalitis A84-

Includes
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  • tick-borne viral meningoencephalitis
Clinical Information
  • Encephalitis caused by neurotropic viruses that are transmitted via the bite of ticks. In europe, the diseases are caused by encephalitis viruses, tick-borne, which give rise to russian spring-summer encephalitis, central european encephalitis, louping ill encephalitis, and related disorders. Powassan encephalitis occurs in north america and russia and is caused by the powassan virus. Aseptic meningitis and rarely encephalitis may complicate colorado tick fever which is endemic to mountainous regions of the western United States. (from Joynt, Clinical Neurology, 1996, ch26, pp14-5)
Codes
  • A84 Tick-borne viral encephalitis
    • A84.0 Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis]
    • A84.1 Central European tick-borne encephalitis
    • A84.8 Other tick-borne viral encephalitis
      • A84.81 Powassan virus disease
      • A84.89 Other tick-borne viral encephalitis
    • A84.9 Tick-borne viral encephalitis, unspecified