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Abstract

Prepartum Supplementation to Improve Transfer of Passive Immunity and Growth

1
Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, St Lucia 4072, Australia
2
Department of Agriculture and Fisheries, Charters Towers 4820, Australia
3
College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville 4811, Australia
*
Author to whom correspondence should be addressed.
Presented at the third International Tropical Agriculture Conference (TROPAG 2019), Brisbane, Australia, 11–13 November 2019.
Proceedings 2019, 36(1), 7; https://doi.org/10.3390/proceedings2019036007
Published: 26 December 2019
(This article belongs to the Proceedings of The Third International Tropical Agriculture Conference (TROPAG 2019))
Late pregnant cows often experience nutritional stress in northern Australia, which reduces colostrum secretion, health, and likelihood of survival of neonatal calves. The effect of prepartum supplementation on the transfer of passive immunity and growth of calves was investigated. The decline in prepartum progesterone was the hypothesised mechanism regulating the transfer of passive immunity. Ninety pregnant Droughtmaster heifers and 45 Brahman cows were used. Animals were stratified by body weight and expected calving date, and separated into two blocks of heifers and one block of cows. Animals were randomly allocated into nutritional treatments, where all were fed low quality Rhodes-grass hay: (1) Control hay only; (2) Protein (PRO), supplemented with 1 kg/d of protein supplement; and (3) Yeast fermentation products (YFP), protein supplement plus 14 g Saccharomyces cerevisiae fermentation product (NaturSafeTM). Data for final analyses was available from 92 calves on transfer of passive immunity and from 59 cow/calf pairs on prepartum progesterone decline. Treatment means were compared via orthogonal contrasts for the effect of supplementation PRO and YFP. Protein supplementation for an average of 14 d hastened the decline in the concentration of serum progesterone before parturition (p < 0.01) and tended (p = 0.09) to increase growth rate of calves during the first 10 d (1.0 vs. 0.9 kg/d). However, there was no effect of PRO on neonatal calves plasma immunoglobulin-G1 (IgG1) concentration (p = 0.43). Adding YFP further hastened the progesterone decline before parturition (p < 0.05) and tended to increase plasma IgG1 (p = 0.08). Short term nutritional supplementation prepartum may improve transfer of passive immunity and neonatal calf growth.
Keywords: beef cattle; maternal nutrition; progesterone beef cattle; maternal nutrition; progesterone
MDPI and ACS Style

Silva, L.F.P.; Muller, J.; Cavalieri, J.; Fordyce, G. Prepartum Supplementation to Improve Transfer of Passive Immunity and Growth. Proceedings 2019, 36, 7. https://doi.org/10.3390/proceedings2019036007

AMA Style

Silva LFP, Muller J, Cavalieri J, Fordyce G. Prepartum Supplementation to Improve Transfer of Passive Immunity and Growth. Proceedings. 2019; 36(1):7. https://doi.org/10.3390/proceedings2019036007

Chicago/Turabian Style

Silva, Luis F. P., Jarud Muller, John Cavalieri, and Geoffry Fordyce. 2019. "Prepartum Supplementation to Improve Transfer of Passive Immunity and Growth" Proceedings 36, no. 1: 7. https://doi.org/10.3390/proceedings2019036007

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