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Appl Environ Microbiol. 1994 November; 60(11): 4203-4206

Cell culture and PCR determination of poliovirus inactivation by disinfectants.

Department of Microbiology and Immunology, University of Arizona, Tucson 85721.

ABSTRACT

Inactivation of poliovirus type 1 by 1 N HCl, 1 N NaOH, 0.5 and 1.0 mg of free chlorine per liter, and UV light was compared by using cell culture and seminested PCR (30 cycles of reverse transcriptase-PCR plus 30 cycles of seminested PCR). A minimum contact time of 45 min with HCl, 3 min with NaOH, 3 and 6 min with 1.0 and 0.5 mg of free chlorine per liter, respectively, was required to render 1.64 x 10(2) PFU of poliovirus type 1 per ml undetectable by seminested PCR. In cell culture, a minimum contact time of 5 min to HCl, 30 s to NaOH, and 1 min to either chlorine concentration was required to render the viruses undetectable by the plaque assay method. No correlation was observed between results by PCR and cell culture when viruses were exposed to UV light. These data suggest that inactivated virus with intact nucleic acid sequences can be detected by PCR.

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