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Five immunofluorescence (IF) kits or reagents (Bartels [Bartels Immunodiagnostic Supplies, Inc., Bellevue, Wash.], Imagen [CellTech Diagnostics, Ltd., distributed by Analytab Products, Plainview, N.Y.], Ortho [Ortho Diagnostics Systems, Inc., Raritan, N.J.], Syva [Syva Co., Palo Alto, Calif.], Whittaker [Whittaker Bioproducts, Walkersville, Md.]) were evaluated for typing and laboratory confirmation of herpes simplex virus (HSV). Of 101 clinical isolates tested by each kit or reagent, results for 97 of them were in agreement. Identification of the four isolates with discordant results was performed by restriction endonuclease analysis of the viral DNA. The sensitivity and specificity of the Imagen and Bartels kits were 100%. For the Ortho, Syva, and Whittaker kits or reagents, the HSV type 1 (HSV-1) and HSV type 2 (HSV-2) sensitivities were 97.4 and 100%, 100 and 100%, and 97.4 and 100%, respectively, and the specificities were 100 and 97.4%, 100 and 92.4%, and 100 and 97.4%, respectively. There was one false-positive HSV-2 isolate identified by each of the Ortho and Whittaker kits or reagents. Three false-positive HSV-2 isolates occurred by staining with Syva, giving the erroneous indication of dual isolates. Several isolates stained with Imagen and Whittaker reagents displayed dull IF patterns. A dull green background occurred in ca. one-third of the HSV-2 isolates tested with the Ortho kit. The intensities of IF staining by the Bartels and Syva kits were satisfactory; however, the latter displayed a specificity of 92.7%. A total of 38 and 63 specimens were finally designated as HSV-1 and HSV-2, respectively. Identification of each isolate with the Bartels kit was consistently interpretable and is recommended as the typing and confirmatory assay of choice.

Evaluation of five monoclonal antibody-based kits or reagents for the identification and culture confirmation of herpes simplex virus