Disinfection efficacy against parvoviruses compared with reference viruses

M Eterpi, G McDonnell, V Thomas
Journal of Hospital Infection 2009, 73 (1): 64-70
Some virus species can resist harsh environmental conditions, surviving on surfaces for long periods with the possibility of being transmitted to susceptible hosts. Studies are limited on the efficacy of disinfectants against viruses dried onto surfaces, in particular, with the identification of new pathogenic non-enveloped viruses that are expected to have high resistance to disinfection, such as parvoviruses. In this study a range of commonly used biocides, including heat, was tested against porcine parvovirus (PPV), minute virus of mice (a parvovirus), poliovirus type 1, adenovirus type 5, and vaccinia virus dried onto surfaces. PPV was the most resistant species identified, since many biocides generally considered as effective against non-enveloped viruses and used for high level disinfection demonstrated limited activity. Ethanol had poor activity against all non-enveloped viruses. Effectiveness against these viruses may be important in preventing nosocomial transmission of emerging pathogenic species such as bocavirus and other parvoviruses. This work confirms the need to validate disinfection products against viruses dried onto surfaces and demonstrates that PPV is a particularly resistant surrogate.

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