The transmission of airborne diseases in animals poses great risks to animal safety with potential significant economic losses. In this study, we report on the use of a dielectric barrier discharge (DBD) for in-flight inactivation of an airborne aerosolized porcine reproductive and respiratory syndrome virus. The infectivity of the sampled virus downstream compared to upstream of the DBD reactor as determined by the TCID50 method showed a ∼3.5 log10 reduction in the virus titer. Independent testing of the viral genome by the reverse-transcription quantitative real-time polymerase chain reaction method confirmed the inactivation with minimal filtering effects. Both short-lived species such as (Formula presented.) and (Formula presented.) and peroxynitrous acid (ONOOH) chemistry at low pH in the virus-laden droplets are suggested to be responsible for the observed inactivation.
Bibliographical noteFunding Information:
This material is based upon work supported by the University of Minnesota and the National Science Foundation under Grant No. PHY 1903151. P. J. B. acknowledges Prof. Min Suk Cha for kindly providing the DBD electrode system. The authors thank My Yang for preparing and providing the PRRS virus strain. S. M. G. and H. A. A. acknowledge Tracy L. Otterson, PCR Lab of Minnesota VDL, for kindly providing the standard cDNA transcript of ORF6 of PRRS virus genome. G. N. gratefully acknowledges support from the Kermit and Ione Ebeltoft Interdisciplinary Doctoral Fellowship and the technical assistance of Ankit Moldgy and Wei Xiao. Kindly note that this paper was corrected on 26th March after original publication.
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- dielectric barrier discharge
- porcine reproductive and respiratory syndrome
- reactive species