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Preweaning mortality in piglets in loose-housed herds: etiology and prevalence

  • C. Kielland (a1), H. Wisløff (a2), M. Valheim (a2), A. K. Fauske (a3), O. Reksen (a1) and T. Framstad (a1)...


Preweaning mortality in piglets is a welfare issue, as well as an ethical and economic concern in commercial pig farming. Studying the causes of preweaning mortality and their prevalence is necessary to reduce losses. Preweaning piglet mortality was investigated in a field study including 347 sows from 14 loose-housed Norwegian piglet-producing herds. A total of 5254 piglets were born in these herds during the study period, and 1200 piglets were necropsied. The cause of death was based on pathoanatomical diagnosis (PAD). Preweaning mortality of all piglets in the study was 23.4%, including 6.3% stillborn. The two main causes of preweaning mortality in live-born piglets (n=4924) were trauma (7.1%) and starvation (2.7%). Piglets dying of an infection accounted for 2.0%. Among the necropsied piglets (n=1200), 29.1% had died due to trauma, 26.8% were categorized as stillborn and 11% had died of starvation. Piglets that had died of trauma, had a mean time of death of 1 lactation day (LD 1), ranging from LD 0 to LD 21. The mean time of death of piglets that died due to bacterial infection was LD 9, ranging from LD 0 to LD 31, with Escherichia coli accounting for most infections found in necropsied piglets. Farmers were able to identify death by trauma in piglets, but were less able to identify death due to hunger. Most piglets that died in the preweaning period, died of trauma. Surprisingly, this included large and well-fed piglets. The second most prevalent cause of preweaning mortality was starvation. Improved monitoring may reveal piglets with low body mass index, and additional nutrition may contribute to increase the survival rate.


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Alonso-Spilsbury, M, Mota-Rojas, D, Villanueva-Garcia, D, Martinez-Burnes, J, Orozco, H, Ramirez-Necoechea, R, Mayagoitia, AL and Trujillo, ME 2005. Perinatal asphyxia pathophysiology in pig and human: a review. Animal Reproduction Science 90, 130.
Andersen, IL, Berg, S and Bøe, KE 2005. Crushing of piglets by the mother sow (Sus scrofa) – purely accidental or a poor mother? Applied Animal Behaviour Science 93, 229243.
Damm, BI, Pedersen, LJ, Heiskanen, T and Nielsen, NP 2005. Long-stemmed straw as an additional nesting material in modified Schmid pens in a commercial breeding unit: effects on sow behaviour, and on piglet mortality and growth. Applied Animal Behaviour Science 92, 4560.
Edwards, SA 2002. Perinatal mortality in the pig: environmental or physiological solutions? Livestock Production Science 78, 312.
Edwards, SA, Smith, WJ, Fordyce, C and MacMenemy, F 1994. An analysis of the causes of piglet mortality in a breeding herd kept outdoors. Veterinary Record 135, 324327.
Engblom, L, Eliasson-Selling, L, Lundeheim, N, Belák, K, Andersson, K and Dalin, A-M 2008. Post mortem findings in sows and gilts euthanised or found dead in a large Swedish herd. Acta Veterinaria Scandinavica 50, 25.
Fanaroff, AA and Martin, RJ 2002. Neonatal-perinatal medicine: diseases of the fetus and infant, 7th edition. Mosby, St. Louis, MO, USA.
Grøndalen, T, Liven, E, Djønne, BK, Gjestvang, MS, Jæger, G and Utlev, H 1986. Smågrisproduksjon og smågrisdødelighet i 13 norske besetninger. In English: Piglet production and mortality in Norwegian herds. Vestfold Norsk Veterinærtidsskrift 98, 611622.
Hales, J, Moustsen, VA, Nielsen, MBF and Hansen, CF 2013. Individual physical characteristics of neonatal piglets affect preweaning survival of piglets born in a noncrated system. Journal of Animal Science 91, 49915003.
Ingris 2014. Årsstatistikk 2014 (Annual report). Retrieved on June 2014 from
Kielland, C, Rootwelt, V, Reksen, O and Framstad, T 2015. The association between immunoglobulin G in sow colostrum and piglet plasma. Journal of Animal Science 93, 44534462.
KilBride, AL, Mendl, M, Statham, P, Held, S, Harris, M, Cooper, S and Green, LE 2012. A cohort study of preweaning piglet mortality and farrowing accommodation on 112 commercial pig farms in England. Preventive Veterinary Medicine 104, 281291.
Leenhouwers, JI, van der Lende, T and Knol, EF 1999. Analysis of stillbirth in different lines of 578 pig. Livestock Production Science 57, 243253.
Muns, R, Nuntapaitoon, M and Tummaruk, P 2016. Non-infectious causes of pre-weaning mortality in piglets. Livestock Science 184, 4657.
Pedersen, LJ, Berg, P, Jørgensen, G and Andersen, IL 2011. Neonatal piglet traits of importance for survival in crates and indoor pens. Journal of Animal Science 89, 12071218.
Pedersen, LJ, Jørgensen, E, Heiskanen, T and Damm, BI 2006. Early piglet mortality in loose-housed sows related to sow and piglet behaviour and to the progress of parturition. Applied Animal Behaviour Science 96, 215232.
Quesnel, H, Farmer, C and Devillers, N 2012. Colostrum intake: influence on piglet performance and factors of variation. Livestock Science 146, 105114.
Rootwelt, V, Reksen, O, Farstad, W and Framstad, T 2012. Associations between intrapartum death and piglet, placental, and umbilical characteristics. Journal of Animal Science 90, 42894296.
Rosvold, EM, Kielland, C, Ocepek, M, Framstad, T, Fredriksen, B, Andersen-Ranberg, I, Næss, G and Andersen, IL 2017. Management routines influencing piglet survival in loose-housed sow herds. Livestock Science 196, 16.
Schmidt, M, Winther, KD, Secher, JO and Callesen, H 2015. Postmortem findings in cloned and transgenic piglets dead before weaning. Theriogenology 84, 10141023.
Strange, T, Ask, B and Nielsen, B 2013. Genetic parameters of the piglet mortality traits stillborn, weak at birth, starvation, crushing, and miscellaneous in crossbred pigs. Journal of Animal Science 91, 15621569.
Varley, MA 1992. Neonatal survival: an overview. B.S.A.P. occasional publications volume 17, pp. 17. Wagtendonk-de
Viera, AJ and Garreth, JM 2005. Understanding interobserver agreement: the kappa statistic. Family Medicine 37, 360363.
Weber, R, Keil, NM, Fehr, M and Horat, R 2009. Factors affecting piglet mortality in loose farrowing systems on commercial farms. Livestock Science 124, 216222.
Westin, R, Holmgren, N, Hultgren, J, Ortman, K, Linder, A and Algers, B 2015. Post-mortem findings and piglet mortality in relation to strategic use of straw at farrowing. Preventive Veterinary Medicine 119, 141152.



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