Case report describing the clinical course of porcine epidemic diarrhea in a commercial boar stud and return of the stud to service after whole-herd inoculation with porcine epidemic diarrhea virus
Marlena McCarty, DVM; Tom Petznick, DVM; Chris Kuster, DVM, PhD; Leslie Bower, MS; Jianqiang Zhang, MD, PhD; Kyoung-Jin Yoon, DVM, PhD, Diplomate ACVM; Darin Madson, DVM, PhD, Diplomate ACVP
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In January 2014, an outbreak of porcine epidemic diarrhea (PED) occurred in a PED-naive commercial boar stud. This report documents the outbreak following whole-herd PED virus (PEDV) inoculation with fecal material, cleaning procedures, sentinel exposure, and semen supply to naive sow farms. Boar saliva samples were diagnostically comparable to rectal swabs and collection dummy Swiffer (Proctor and Gamble, Cincinnati, Ohio) samples for PEDV RNA detection. Viral RNA was not detected in semen samples collected during the outbreak, yet reproductive organs from sacrificed boars 5 days after exposure were positive by polymerase chain reaction. Placed sentinel and replacement animals in the stud remained clinically negative following cleaning procedures, and semen shipments started 13 weeks post inoculation (WPI) to one PED-naive sow farm, with six other naive sow farms resuming shipments after 17 WPI. All sow farms remained naive 10 months later. This report demonstrates that it is possible for a commercial boar stud to experience a PED outbreak without infecting naive sow farms at the onset, retain valuable genetics, and resume semen delivery to PED-naive sow farms after cleaning, disinfection, and testing, without infecting sows upon re-opening.
Keywords: porcine epidemic diarrhea virus, artificial insemination, boar stud, PEDV
Cite as: McCarty M, Petznick T, Kuster C, et al. Case report describing the clinical course of porcine epidemic diarrhea in a commercial boar stud and return of the stud to service after whole-herd inoculation with porcine epidemic diarrhea virus. J Swine Health Prod 2015;23(5):264-271.
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