Intrathecal synthesis of IgG antibodies to varicella‐zoster virus in two cases of acute aseptic meningitis syndrome with no cutaneous lesions

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Abstract
IgG antibodies to varicella‐zoster virus (VZV) were detected by indirect enzymeimmunoassay (EIA) in CSF of two patients with acute aseptic meningitis syndrome (AAMS) not associated with evident cutaneous lesion or recent history of zoster infection. Their characteristic features and serological data are compared with those observed in two patients with AAMS and zoster cutaneous lesions, and in 13 patients with AAMS of unknown or other etiology. According to several indexes applied to assess the origin of the detected antibodies, it is concluded that VZV IgG antibodies are of intrathecal production. The possible etiologic relationship between the neurological syndrome and the detection of VZV antibodies in CSF is discussed. Routine serological procedures are proposed for the diagnosis of CNS acute infections of probable viral etiology that should provide additional data on these rarely described cases.