Serum viral antibody titer in vestibular neuronitis.

Fifty-seven cases of vestibular neuronitis were evaluated for viral infection by means of serum antibody titer. The viruses tested were herpes simplex virus, varicella-zoster virus, cytomegalovirus, EB virus, adenovirus, influenza virus A, influenza virus B, parainfluenza virus 3, mumps virus, rubella virus and measles virus. Paired sera were examined in 49 cases among 57 cases, 26 cases showed significant change (four-fold or greater change) in viral antibody titer. Only one case (53-year old female) showed high HSV 1 IgM antibody level by ELISA method, so the vestibular neuronitis in this case was assumed to have a close relation to viral infection.