Display options
Cite
Kristensen CS, Christiansen MG, Pedersen K, et al. Production losses five months after outbreak with a recombinant of two PRRSV vaccine strains in 13 Danish sow herds. Porcine Health Manag. 2020;6:26doi: 10.1186/s40813-020-00165-z.
Kristensen, C. S., Christiansen, M. G., Pedersen, K., & Larsen, L. E. (2020). Production losses five months after outbreak with a recombinant of two PRRSV vaccine strains in 13 Danish sow herds. Porcine health management, 626. https://doi.org/10.1186/s40813-020-00165-z
Kristensen, C S, et al. "Production losses five months after outbreak with a recombinant of two PRRSV vaccine strains in 13 Danish sow herds." Porcine health management vol. 6 (2020): 26. doi: https://doi.org/10.1186/s40813-020-00165-z
Kristensen CS, Christiansen MG, Pedersen K, Larsen LE. Production losses five months after outbreak with a recombinant of two PRRSV vaccine strains in 13 Danish sow herds. Porcine Health Manag. 2020 Oct 06;6:26. doi: 10.1186/s40813-020-00165-z. eCollection 2020. PMID: 33042567; PMCID: PMC7537099.
Copy Download .nbib Format: NLM
Share it on

Porcine Health Manag. 2020 Oct 06;6:26. doi: 10.1186/s40813-020-00165-z. eCollection 2020.

Production losses five months after outbreak with a recombinant of two PRRSV vaccine strains in 13 Danish sow herds.

Porcine health management

C S Kristensen, M G Christiansen, K Pedersen, L E Larsen

Affiliations

  1. SEGES Danish Pig Research Centre, Copenhagen, Denmark.
  2. Department of Veterinary and Animal Sciences, University of Copenhagen, Frederiksberg, Denmark.

PMID: 33042567 PMCID: PMC7537099 DOI: 10.1186/s40813-020-00165-z

Abstract

BACKGROUND: In July 2019, a PRRSV-negative boar station was infected with a recombinant of two PRRSV vaccine strains, which subsequently spread to at least 36 herds that had received semen from the boar station. In the following months, all the infected herds reported reduced productivity. The aim of the present study was to evaluate the impact of the PRRS outbreak.

RESULTS: Production data were collected from 13 of the herds. The average levels of farrowings/week, liveborns/litter, stillborns/litter, pre-weaning mortality and weaned pigs/litter were compared for the five-month period after infection and the preceding 7 months before infection with the new variant of PRRSV-1. Twelve herds experienced a decrease in farrowings/week (0.1-10.8% fewer farrowings/week), and all herds experienced fewer liveborns (0.8-4.8 fewer liveborns/litter) and more stillborns (0.6-2.6 more stillborns/litter). Pre-weaning mortality nearly doubled in half of the herds. Overall, the 13 herds were missing 2.4-6.5 pigs/litter at weaning during the 5 months after infection compared to the seven preceding months before infection.

CONCLUSION: In this study, the impact of this new PRRSV-1 variant on productivity exceeded that typically seen in Danish herds infected with PRRSV-1.

© The Author(s) 2020.

Keywords: PRRSV; Pre-weaning mortality; Production loss; Stillborn

Conflict of interest statement

Competing interestsThree authors worked for SEGES Danish Pig Research Centre. The aim of the Danish Pig Research Centre is to safeguard the interests of the Danish pig producers.

References

  1. J Gen Virol. 2002 Aug;83(Pt 8):1861-1873 - PubMed
  2. Vet Q. 1994 Jul;16(2):95-100 - PubMed
  3. J Am Vet Med Assoc. 2005 Aug 1;227(3):385-92 - PubMed
  4. Arch Virol. 2008;153(8):1479-88 - PubMed
  5. Transbound Emerg Dis. 2020 Mar 27;: - PubMed
  6. J Gen Virol. 2006 Jul;87(Pt 7):1835-1841 - PubMed
  7. Viruses. 2019 Mar 23;11(3): - PubMed
  8. Virus Res. 2010 Dec;154(1-2):123-32 - PubMed
  9. Vet Rec. 2011 Oct 22;169(17):441 - PubMed
  10. Vet Microbiol. 1997 Apr;55(1-4):317-22 - PubMed
  11. Vet Rec. 2012 Mar 3;170(9):225 - PubMed
  12. Virus Res. 2013 Dec 26;178(2):197-205 - PubMed

Publication Types