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Prevalence of failure of passive immunity transfer in Australian non‐replacement dairy calves

Failure of passive immunity transfer (FPIT) increases the risk of morbidity and mortality in dairy calves. The prevalence of FPIT in dairy calves has generally been reported to be high, with FPIT estimated to occur in 38%–42% of Australian dairy calves. However, the focus of previous studies has bee...

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Autores principales: Roadknight, N, Jongman, E, Mansell, P, Courtman, N, McGill, D, Hepworth, G, Fisher, A
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Wiley Publishing Asia Pty Ltd 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9544974/
https://www.ncbi.nlm.nih.gov/pubmed/35355243
http://dx.doi.org/10.1111/avj.13160
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author Roadknight, N
Jongman, E
Mansell, P
Courtman, N
McGill, D
Hepworth, G
Fisher, A
author_facet Roadknight, N
Jongman, E
Mansell, P
Courtman, N
McGill, D
Hepworth, G
Fisher, A
author_sort Roadknight, N
collection PubMed
description Failure of passive immunity transfer (FPIT) increases the risk of morbidity and mortality in dairy calves. The prevalence of FPIT in dairy calves has generally been reported to be high, with FPIT estimated to occur in 38%–42% of Australian dairy calves. However, the focus of previous studies has been on replacement heifer calves. Our aim was to assess the prevalence of FPIT in Victorian bobby calves (non‐replacement dairy calves). We collected blood samples from 3608 bobby calves at three abattoirs at exsanguination, and measured serum total protein as an indicator of passive transfer. We found that 36% of bobby calves showed evidence of FPIT (serum total protein ≤52 g/L), and 50% of calves had poor or fair passive transfer (<58 g/L). When a subset of calves (from farms with more than five calves in the dataset) was analysed using a linear mixed model, Jersey calves and crossbred/other calves had an estimated 5.3 g/L and 5.1 g/L higher serum total protein concentration, respectively, than Holstein‐Friesian calves (P < 0.001). Our results suggest that the prevalence of FPIT in bobby calves at abattoirs is similar to that reported in dairy heifer calves sampled on farms. A high prevalence of FPIT has implications for bobby calf morbidity and mortality, as well as calf viability and profitability for dairy‐beef production.
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spelling pubmed-95449742022-10-14 Prevalence of failure of passive immunity transfer in Australian non‐replacement dairy calves Roadknight, N Jongman, E Mansell, P Courtman, N McGill, D Hepworth, G Fisher, A Aust Vet J Production Animals Failure of passive immunity transfer (FPIT) increases the risk of morbidity and mortality in dairy calves. The prevalence of FPIT in dairy calves has generally been reported to be high, with FPIT estimated to occur in 38%–42% of Australian dairy calves. However, the focus of previous studies has been on replacement heifer calves. Our aim was to assess the prevalence of FPIT in Victorian bobby calves (non‐replacement dairy calves). We collected blood samples from 3608 bobby calves at three abattoirs at exsanguination, and measured serum total protein as an indicator of passive transfer. We found that 36% of bobby calves showed evidence of FPIT (serum total protein ≤52 g/L), and 50% of calves had poor or fair passive transfer (<58 g/L). When a subset of calves (from farms with more than five calves in the dataset) was analysed using a linear mixed model, Jersey calves and crossbred/other calves had an estimated 5.3 g/L and 5.1 g/L higher serum total protein concentration, respectively, than Holstein‐Friesian calves (P < 0.001). Our results suggest that the prevalence of FPIT in bobby calves at abattoirs is similar to that reported in dairy heifer calves sampled on farms. A high prevalence of FPIT has implications for bobby calf morbidity and mortality, as well as calf viability and profitability for dairy‐beef production. Wiley Publishing Asia Pty Ltd 2022-03-30 2022-07 /pmc/articles/PMC9544974/ /pubmed/35355243 http://dx.doi.org/10.1111/avj.13160 Text en © 2022 The Authors. Australian Veterinary Journal published by John Wiley & Sons Australia, Ltd on behalf of Australian Veterinary Association. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
spellingShingle Production Animals
Roadknight, N
Jongman, E
Mansell, P
Courtman, N
McGill, D
Hepworth, G
Fisher, A
Prevalence of failure of passive immunity transfer in Australian non‐replacement dairy calves
title Prevalence of failure of passive immunity transfer in Australian non‐replacement dairy calves
title_full Prevalence of failure of passive immunity transfer in Australian non‐replacement dairy calves
title_fullStr Prevalence of failure of passive immunity transfer in Australian non‐replacement dairy calves
title_full_unstemmed Prevalence of failure of passive immunity transfer in Australian non‐replacement dairy calves
title_short Prevalence of failure of passive immunity transfer in Australian non‐replacement dairy calves
title_sort prevalence of failure of passive immunity transfer in australian non‐replacement dairy calves
topic Production Animals
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9544974/
https://www.ncbi.nlm.nih.gov/pubmed/35355243
http://dx.doi.org/10.1111/avj.13160
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