Investigating risk factors and possible infectious aetiologies of mummified fetuses on a large piggery in Australia

Nicole Dron, Marta Hernandez-Jover, Rebecca Doyle, Patricia Holyoake

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3 Citations (Scopus)

Abstract

Objective To investigate risk factors and potential infectious aetiologies of an increased mummification rate (>2%) identified over time on a 1200-sow farrow-to-finish farm in Australia. Methods Association of potential non-infectious risk factors and the mummification rate was investigated using 15 years of breeding herd data (40,940 litters) and logistic regression analysis. Samples from a limited number of mummified fetuses were taken to identify potential infectious aetiologies (porcine parvovirus, Leptospira pomona, porcine circovirus type 2, Bungowannah virus and enterovirus). Results Logistic regression analysis suggested that the mummification rate was significantly associated with sow breed and parity, year and total born and stillborn piglets per litter. The mummification rate was lower (P < 0.001) in Landrace (3.4%) and Large White (2.6%) sows than in Duroc sows (4.9%). Gilts (2.9%) had a lower (P < 0.001) mummification rate than older sows. The mummification rate increased with total born litter size and decreased with the number of stillborn piglets (P < 0.001). A clustering effect within individual sows was identified, indicating that some sows with mummified fetuses in a litter were more likely to have repeated mummifications in subsequent litters. No infectious agents were identified in the samples taken. Conclusion Results from this study suggest that the increased mummification rate identified over time on this farm is likely to be a non-infectious multifactorial problem predisposing the occurrence of mummification. Further research is required to better understand the pathophysiology of mummification and the role that different non-infectious factors play in the occurrence of mummified fetuses.
Original languageEnglish
Pages (from-to)472-478
Number of pages7
JournalAustralian Veterinary Journal
Volume92
Issue number12
DOIs
Publication statusPublished - 2014

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sows
fetus
Fetus
risk factors
Leptospira interrogans serovar pomona
litters (young animals)
Porcine Parvovirus
Logistic Models
Regression Analysis
Circovirus
Litter Size
Enterovirus
Parity
Breeding
Cluster Analysis
piglets
regression analysis
Viruses
Ungulate protoparvovirus 1
farms

Cite this

@article{e181184624714672bbcf190c841ecc69,
title = "Investigating risk factors and possible infectious aetiologies of mummified fetuses on a large piggery in Australia",
abstract = "Objective To investigate risk factors and potential infectious aetiologies of an increased mummification rate (>2{\%}) identified over time on a 1200-sow farrow-to-finish farm in Australia. Methods Association of potential non-infectious risk factors and the mummification rate was investigated using 15 years of breeding herd data (40,940 litters) and logistic regression analysis. Samples from a limited number of mummified fetuses were taken to identify potential infectious aetiologies (porcine parvovirus, Leptospira pomona, porcine circovirus type 2, Bungowannah virus and enterovirus). Results Logistic regression analysis suggested that the mummification rate was significantly associated with sow breed and parity, year and total born and stillborn piglets per litter. The mummification rate was lower (P < 0.001) in Landrace (3.4{\%}) and Large White (2.6{\%}) sows than in Duroc sows (4.9{\%}). Gilts (2.9{\%}) had a lower (P < 0.001) mummification rate than older sows. The mummification rate increased with total born litter size and decreased with the number of stillborn piglets (P < 0.001). A clustering effect within individual sows was identified, indicating that some sows with mummified fetuses in a litter were more likely to have repeated mummifications in subsequent litters. No infectious agents were identified in the samples taken. Conclusion Results from this study suggest that the increased mummification rate identified over time on this farm is likely to be a non-infectious multifactorial problem predisposing the occurrence of mummification. Further research is required to better understand the pathophysiology of mummification and the role that different non-infectious factors play in the occurrence of mummified fetuses.",
keywords = "fetal mummification, pigs, risk factors",
author = "Nicole Dron and Marta Hernandez-Jover and Rebecca Doyle and Patricia Holyoake",
note = "Imported on 12 Apr 2017 - DigiTool details were: Journal title (773t) = Australian Veterinary Journal. ISSNs: 0005-0423;",
year = "2014",
doi = "10.1111/avj.12270",
language = "English",
volume = "92",
pages = "472--478",
journal = "Australian Veterinary Journal",
issn = "0005-0423",
publisher = "Wiley-Blackwell",
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TY - JOUR

T1 - Investigating risk factors and possible infectious aetiologies of mummified fetuses on a large piggery in Australia

AU - Dron, Nicole

AU - Hernandez-Jover, Marta

AU - Doyle, Rebecca

AU - Holyoake, Patricia

N1 - Imported on 12 Apr 2017 - DigiTool details were: Journal title (773t) = Australian Veterinary Journal. ISSNs: 0005-0423;

PY - 2014

Y1 - 2014

N2 - Objective To investigate risk factors and potential infectious aetiologies of an increased mummification rate (>2%) identified over time on a 1200-sow farrow-to-finish farm in Australia. Methods Association of potential non-infectious risk factors and the mummification rate was investigated using 15 years of breeding herd data (40,940 litters) and logistic regression analysis. Samples from a limited number of mummified fetuses were taken to identify potential infectious aetiologies (porcine parvovirus, Leptospira pomona, porcine circovirus type 2, Bungowannah virus and enterovirus). Results Logistic regression analysis suggested that the mummification rate was significantly associated with sow breed and parity, year and total born and stillborn piglets per litter. The mummification rate was lower (P < 0.001) in Landrace (3.4%) and Large White (2.6%) sows than in Duroc sows (4.9%). Gilts (2.9%) had a lower (P < 0.001) mummification rate than older sows. The mummification rate increased with total born litter size and decreased with the number of stillborn piglets (P < 0.001). A clustering effect within individual sows was identified, indicating that some sows with mummified fetuses in a litter were more likely to have repeated mummifications in subsequent litters. No infectious agents were identified in the samples taken. Conclusion Results from this study suggest that the increased mummification rate identified over time on this farm is likely to be a non-infectious multifactorial problem predisposing the occurrence of mummification. Further research is required to better understand the pathophysiology of mummification and the role that different non-infectious factors play in the occurrence of mummified fetuses.

AB - Objective To investigate risk factors and potential infectious aetiologies of an increased mummification rate (>2%) identified over time on a 1200-sow farrow-to-finish farm in Australia. Methods Association of potential non-infectious risk factors and the mummification rate was investigated using 15 years of breeding herd data (40,940 litters) and logistic regression analysis. Samples from a limited number of mummified fetuses were taken to identify potential infectious aetiologies (porcine parvovirus, Leptospira pomona, porcine circovirus type 2, Bungowannah virus and enterovirus). Results Logistic regression analysis suggested that the mummification rate was significantly associated with sow breed and parity, year and total born and stillborn piglets per litter. The mummification rate was lower (P < 0.001) in Landrace (3.4%) and Large White (2.6%) sows than in Duroc sows (4.9%). Gilts (2.9%) had a lower (P < 0.001) mummification rate than older sows. The mummification rate increased with total born litter size and decreased with the number of stillborn piglets (P < 0.001). A clustering effect within individual sows was identified, indicating that some sows with mummified fetuses in a litter were more likely to have repeated mummifications in subsequent litters. No infectious agents were identified in the samples taken. Conclusion Results from this study suggest that the increased mummification rate identified over time on this farm is likely to be a non-infectious multifactorial problem predisposing the occurrence of mummification. Further research is required to better understand the pathophysiology of mummification and the role that different non-infectious factors play in the occurrence of mummified fetuses.

KW - fetal mummification

KW - pigs

KW - risk factors

U2 - 10.1111/avj.12270

DO - 10.1111/avj.12270

M3 - Article

C2 - 25424759

VL - 92

SP - 472

EP - 478

JO - Australian Veterinary Journal

JF - Australian Veterinary Journal

SN - 0005-0423

IS - 12

ER -