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Comparison of primary rabbit kidney and MRC-5 cells and two stain procedures for herpes simplex virus detection by a shell vial centrifugation method.

Department of Pathology, University of California Irvine Medical Center, Orange 92668.

ABSTRACT

By using a conventional tissue culture method as a standard, four shell vial centrifugation culture (SVC) formats were compared for herpes simplex virus (HSV) detection in 300 clinical samples. Both MRC-5 and primary rabbit kidney (PRK) cells were used in the conventional and SVC systems. In addition, both a direct monoclonal fluorescent antibody to HSV (MAb-FA; Syva Corporation, Palo Alto, Calif.) and an indirect HSV polyclonal antibody-horseradish peroxidase stain (poly-HRP; Difco Laboratories, Detroit, Mich.) were used to stain shell vials of both cell types. Conventional tubes were incubated for up to 7 days with daily examination for cytopathic effect, which was confirmed as HSV by staining with an MAb-FA. Shell vials were inoculated, centrifuged, incubated for 16 to 24 h, and stained directly with MAb-FA or indirectly with a poly-HRP stain. Of the 300 specimens examined, 82 (27%) were HSV positive by conventional tissue culture. PRK cells detected 81 (99%) positive specimens, compared with 74 (90%) specimens detected with MRC-5 cells. Of the 82 positive specimens by conventional culture, the SVC formats detected 68 by MRC-5 and MAb-FA, 74 by MRC-5 and poly-HRP, 64 by PRK and MAb-FA, and 77 by PRK and poly-HRP. Therefore, PRK stained by an indirect method with poly-HRP was the most sensitive of the SVC formats tested, detecting 94% of the positive specimens.

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