Abstract:

Understanding the role of feed manufacturing and delivery within a series of porcine deltacoronavirus investigations

C. Grace Elijah, DVM; Olivia L. Harrison; Allison K. Blomme; Jason C. Woodworth, PhD; Cassandra K. Jones, PhD; Chad B. Paulk, PhD; Jordan T. Gebhardt, DVM, PhD

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Two feed mills and three breed-to-wean facilities were investigated after being diagnosed with porcine deltacoronavirus (PDCoV) with initial suspicion that feed manufacture and delivery processes were involved in disease transmission. Both feed mills were audited, and environmental samples collected in areas that were deemed high risk for virus contamination. All breed-to-wean facilities had PDCoV detected as would be expected, while the only positive samples for enteric coronaviruses associated with feed mills were feed delivery trucks. These results indicate that feed delivery surfaces can help spread virus during an ongoing disease outbreak and must be considered when determining the outbreak origin.

Keywords: epidemiology, feed safety, porcine deltacoronavirus

Cite as: Elijah CG, Harrison OL, Blomme AK, Woodworth JC, Jones CK, Paulk CB, Gebhardt JT. Understanding the role of feed manufacturing and delivery within a series of porcine deltacoronavirus investigations. J Swine Health Prod 2022;30(1):17-23.

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