Effect of neonatal immunoglobulin status on the outcomes of spring-born suckler calves.
Journal
The Veterinary record
ISSN: 2042-7670
Titre abrégé: Vet Rec
Pays: England
ID NLM: 0031164
Informations de publication
Date de publication:
Mar 2023
Mar 2023
Historique:
revised:
01
12
2022
received:
08
09
2022
accepted:
29
12
2022
pubmed:
1
2
2023
medline:
22
3
2023
entrez:
31
1
2023
Statut:
ppublish
Résumé
Successfully rearing beef calves to weaning and beyond determines the economic performance of a beef farm. As such, it is important to understand the factors influencing performance outcomes. This study recorded the health events, mortality and growth rates of 674 calves born on 50 commercial beef farms in Great Britain using a postsampling questionnaire. All calves had a known postcolostral serum IgG status. Preweaning mortality in the study population was 1.5% (10/674 calves), while the treatment rate was 6.4% (43/674 calves). Serum IgG, calf sex and dystocia were significant predictors of whether a calf died and/or required treatment. Average daily liveweight gain was calculated for calves where weaning weights were provided (n = 513). Serum IgG and calf sex were consistent predictors of calf growth rates, while birthweight and whether the calf was born to a cow or heifer were predictive in a model where average daily liveweight gain was converted to a binary response variable using the mean average daily liveweight gain on the calf's farm of origin. Morbidity and mortality were lower than comparable studies, potentially due to limitations in the study design. Serum IgG and calf sex were significant explanatory variables that affected beef calf average daily liveweight gain. For every 5 g/L increase in serum IgG, the odds ratio of dying and/or requiring treatment decreased by 0.86.
Sections du résumé
BACKGROUND
BACKGROUND
Successfully rearing beef calves to weaning and beyond determines the economic performance of a beef farm. As such, it is important to understand the factors influencing performance outcomes.
METHODS
METHODS
This study recorded the health events, mortality and growth rates of 674 calves born on 50 commercial beef farms in Great Britain using a postsampling questionnaire. All calves had a known postcolostral serum IgG status.
RESULTS
RESULTS
Preweaning mortality in the study population was 1.5% (10/674 calves), while the treatment rate was 6.4% (43/674 calves). Serum IgG, calf sex and dystocia were significant predictors of whether a calf died and/or required treatment. Average daily liveweight gain was calculated for calves where weaning weights were provided (n = 513). Serum IgG and calf sex were consistent predictors of calf growth rates, while birthweight and whether the calf was born to a cow or heifer were predictive in a model where average daily liveweight gain was converted to a binary response variable using the mean average daily liveweight gain on the calf's farm of origin.
LIMITATIONS
CONCLUSIONS
Morbidity and mortality were lower than comparable studies, potentially due to limitations in the study design.
CONCLUSION
CONCLUSIONS
Serum IgG and calf sex were significant explanatory variables that affected beef calf average daily liveweight gain. For every 5 g/L increase in serum IgG, the odds ratio of dying and/or requiring treatment decreased by 0.86.
Substances chimiques
Immunoglobulin G
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e2587Informations de copyright
© 2023 The Authors. Veterinary Record published by John Wiley & Sons Ltd on behalf of British Veterinary Association.
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