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In Vitro
Journal Article
Inactivation kinetics of model and relevant blood-borne viruses by treatment with sodium hydroxide and heat.
To determine the efficacy of a clean-in-place system for the inactivation of viruses present in human plasma, the effect of 0.1 M sodium hydroxide at 60 degrees C on viral infectivity was investigated. Inactivation of the following model and relevant viruses were followed as a function of time: human hepatitis A virus (HAV), canine parvovirus (CPV; a model for human parvovirus B-19) pseudorabies virus (PRV, a model for hepatitis B virus), and bovine viral diarrhoea virus (BVDV, a model for hepatitis C virus and human immunodeficiency virus). Infectivity of CPV was determined by a novel in situ EIA method which will prove useful for studies to validate parvovirus inactivation or removal. Infectivity of BVDV, PRV and CPV were shown to be reproducibly inactivated below the limit of detection by 0.1 M NaOH at 60 degrees C within 30 s. HAV was inactivated to below the limit of detection within 2 min. Treatment with heat alone also resulted in some log reduction for all viruses tested except for CPV which remained unaffected after heating at 60 degrees C for 16 min. Treatment of HAV with hydroxide alone (up to 1.0 m) at 15 degrees C did not lead to rapid inactivation. Collectively, these data suggest that 0.1 M NaOH at 60 degrees C for two min should be sufficient to inactivate viruses present in process residues.
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