The kit is intended for professional use for the qualitative and semiquantitative detection of IgG antibodies to varicella zoster virus (VZV) in human serum and plasma and for the determination of intrathecal synthesis in cerebrospinal fluid. The test is also useful in the diagnosis of VZV-associated diseases, namely varicella and herpes zoster. The test can also be utilized for the differential detection of neuroinfections (encephalitis, meningitis, cerebellitis, vasculitis, myelitis and inflammatory neuropathies), infections of the eye and of exanthematous diseases of the skin.