781. Antiviral Effectiveness of Different Disinfectants on Surfaces Contaminated with Surrogate Non-enveloped Viruses

Abstract

Abstract Background Contamination of surfaces with virions remains an important medical issues because they can serve as fomites for viral transmission. Long acting disinfectants are important because viruses can remain viable for extended durations. Here we assessed the anti-viral efficacy of various environmental spray disinfectants against F specific coliphage MS2, and Feline Calicivirus (FCV) as surrogate non-enveloped viruses. Methods MS2 was grown and titrated according to Environmental Protection Agency method 1601 and counted as plague forming unit per milliliter (PFU/mL.). Strain F9 of FCV was propagated and titrated in monolayers of Crandell-Reese Feline Kidney cells. Commercially available and an experimental disinfectant based on a biguanide combination were tested. The disinfectants, both wet and as dried residues, were compared on silicone surfaces for reduction of viral loads following 1-minute exposure to high viral load challenges (106-107 PFU/ml). Sterilized deionized water was used as a control. Results Results (as log10 reduction relative to sterilized deionized water control) are tabulated below for the disinfectants in wet and dry states following 1-minute viral challenges. Log10 reductions of MS2 and FCV viral loads following 1-minute exposures to disinfectants in wet and dry residue states. Conclusion The disinfectants were generally much less effective as dried residues than wet. The biguanide-combination and hydrogen peroxide-combination disinfectants were the most effective disinfectants tested in both wet and dry residue states. Both warrant further study for extended eradication of highly infectious viruses on surfaces. Disclosures All Authors: No reported disclosures