Comparative Study
Journal Article
Research Support, Non-U.S. Gov't
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Is Bell's palsy a reactivation of varicella zoster virus?

Despite various pointers to an infectious aetiology, the cause of Bell's palsy remains obscure. We examined paired sera from 62 patients with facial palsy and 50 age and sex matched contemporaneous controls. Significantly more patients than controls had IgM antibodies by ELISA to varicella zoster virus (56.5% vs. 20%, P = 0.0001) and herpes simplex virus (41.9% vs. 18%, P = 0.006). Additionally, significantly more patients than controls were positive for CF antibody to varicella zoster virus (14.5% vs. 0%, P = 0.004) but not to herpes simplex or cytomegalovirus. Significantly more controls than patients (54% vs. 25.8%, P = 0.002) had no evidence of antigenic stimulation by any of the herpesvirus group. No significant difference between patients and controls in seropositivity by IgM ELISA to cytomegalovirus. Epstein-Barr virus and IFA for human herpes virus 6 was found. Furthermore, there was no significant difference between the two groups as to evidence of recent infection by the following agents: rubella virus and Borrelia burgdorferi by IgM ELISA, influenza A. influenza B, adenovirus, respiratory syncytial virus, mumps and measles. Mycoplasma pneumoniae, Coxiella burnetii and chlamydia spp. by complement fixation test. The first reported case of clinically and serologically proven Mycoplasma pneumoniae pneumonia associated with Bell's palsy is described. The rate of complete recovery at 6-8 weeks after onset was not significantly different in patients who were given steroids compared to those who were not. Ear related symptoms were the most common, occurring in 12 of 65 cases, but only three (4.6%) had clinical shingles (vesicles in ear).(ABSTRACT TRUNCATED AT 250 WORDS)

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