Smart Card Decontamination in a High-Containment Laboratory.

Abstract

Validated procedures for decontamination of laboratory surfaces and equipment are essential to biosafety and biorisk programs at high-containment laboratories. Each high-containment laboratory contains a unique combination of surfaces, procedures, and biological agents that require decontamination methods tailored to specific facility practices. The Plum Island Animal Disease Center (PIADC) is a high-containment laboratory operating multiple biosafety level (BSL)-3, ABSL-3, and BSL-3 Ag spaces. The PIADC facility requires the use of federally issued smart cards, called personal identity verification (PIV) cards, to access information technology (IT) networks both outside and within the high-containment laboratory. Because PIV cards may require transit from the BSL-3 to office spaces, a validated procedure for disinfecting PIV card surfaces prior to removal from the laboratory is critical to ensure biosafety and biosecurity. Two high-risk select agents used in the PIADC high-containment laboratory are foot-and-mouth disease virus (FMDV) and swine vesicular disease virus (SVDV). We evaluated disinfection of PIV cards intentionally spotted with FMDV and SVDV using a modified quantitative carrier test and the liquid chemical disinfectant Virkon® S. Our experimental design modeled a worst-case scenario of PIV card contamination and disinfection by combining high concentrations of virus dried with an organic soil load and use of aged Virkon® S prepared in hard water. Results showed that FMDV and SVDV dried on PIV card surfaces were completely inactivated after immersion for 30 and 60 seconds, respectively, in a 5-day-old solution of 1% Virkon® S. Therefore, this study provided internal validation of PIADC biosafety protocols by demonstrating the efficacy of Virkon® S to inactivate viruses on contaminated smart cards at short contact times.