Bell Palsy and Herpes Simplex Virus: Identification of Viral DNA in Endoneurial Fluid and Muscle

  title={Bell Palsy and Herpes Simplex Virus: Identification of Viral DNA in Endoneurial Fluid and Muscle},
  author={S. Murakami and M. Mizobuchi and Y. Nakashiro and T. Doi and N. Hato and N. Yanagihara},
  journal={Annals of Internal Medicine},
Bell palsy is the most common cause of facial paralysis worldwide; it has an incidence of 20 to 30 per 100 000 persons [1]. Although the second most frequent cause of facial paralysis, the Ramsay-Hunt syndrome, is known to be caused by reactivated varicella-zoster virus [2], the etiologic agent responsible for Bell palsy has not been identified. Many events, such as viral infection [1, 3, 4], ischemia [5], and autoimmune reaction [6], have been proposed as causes of Bell palsy. Viral infection… Expand
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