Evaluation of the effectiveness of the surepure turbulator ultraviolet-C irradiation equipment on inactivation of different enveloped and non-enveloped viruses inoculated in commercially collected liquid animal plasma

Abstract

This study was partly supported by Secretaria de Universitats i Recerca del Departament d'Economia i Coneixement of the Generalitat de Catalunya. Author who received the award:EB. Grant number: 2014 DI 066. Full name of funder: Secretaria de Universitats i Recerca del Departament d'Economia i Coneixement of the Generalitat de Catalunya. URL funder website: universitatsirecerca.gencat.cat/ca/inici. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. APC EUROPE provided support in the form of salaries for authors EB, CR, JR and JPolo retrospectively, but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. We want to thank the Secretaria de Universitats i Recerca del Departament d'Economia i Coneixement de la Generalitat de Catalunya (2014 DI 066) for its colaboration.

Altres ajuts: DIUE/2014 DI 066

The objective of this study was to evaluate the effectiveness of the SurePure Turbulator ultraviolet-C (UV-C, 254 nm wavelength) irradiation equipment on inactivation of different enveloped and non-enveloped viruses in commercially collected liquid animal plasma. Specifically, Pseudorabies virus (PRV), Porcine reproductive and respiratory syndrome virus (PRRSV), Porcine epidemic diarrhea virus (PEDV), Bovine viral diarrhea virus (BVDV), Classical swine fever virus (CSFV), Swine influenza virus (SIV) as enveloped viruses and Porcine parvovirus (PPV), Swine vesicular disease virus (SVDV), Porcine circovirus type 2 (PCV-2) and Senecavirus A (SVA) as non-enveloped viruses, were inoculated in bovine or porcine plasma and subjected to different UV-C irradiation doses (0, 750, 1500, 3000, 6000 and 9000 J/L) using an UV-C device developed for opaque liquid working under turbulent flow. The enveloped viruses tested were inactivated at < 3000 J/L of UV-C, being the dose needed to inactivate 4 log TCID (4D) of 1612 J/L for PRV,1004 J/L for PRRSV, 1953 J/L for PEDV, 1639 J/L for SIV, 1641 J/L for CSFV and 1943 J/L for BVDV. The non-enveloped viruses tended to have higher 4D values: 2161 J/L for PPV, 3223 J/L for SVA and 3708 J/L for SVDV. Because the initial viral concentration was <4.0 Log for PCV-2, it was not possible to calculate the 4D value for this virus. In conclusion, these results demonstrated that the SurePure Turbulator UV-C treatment system is capable of inactivating significant levels of swine viruses inoculated in commercially collected porcine or bovine plasma. It was concluded that irradiation with UV-C can provide an additional redundant biosafety feature in the manufacturing process of spray-dried animal plasma.