Rapid Diagnosis of Varicella-Zoster Virus Infections by Countercurrent Immunoelectrophoresis

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Abstract
A simple, accurate, and rapid method for laboratory diagnosis of varicella-zoster virus (VZV) infections using countercurrent immunoelectrophoresis (CIE) is described. CIE uses zoster convalescent-phase serum to detect VZV antigen in vesicular fluid. Eighty-six patients were studied, 58 with VZV infections and 28 with vesicular or bullous rashes due to causes other than VZV infection. All patients with documented VZV infection had positive CIE tests for VZV, and the controls were uniformly negative. VZV antigen could be detected up to 15 (varicella) or 16 (zoster) days after the onset of rash. The sensitivity of CIE for detection of VZV antigen was compared with results of viral isolation, immune adherence hemagglutination, and an indirect enzyme-linked immunosorbent assay.

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