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Health Benefits of Supplementing Nursery Pig Diets with Microalgae or Fish Oil

Authors :
Alison V. Lee
Lan You
Se-Young Oh
Ziwei Li
Alexandra Code
Cuilan Zhu
Rebecca E. Fisher-Heffernan
Timothy R. H. Regnault
Cornelis F. M. De Lange
Lee-Anne Huber
Niel A. Karrow
Source :
Animals, Vol 9, Iss 3, p 80 (2019)
Publication Year :
2019
Publisher :
MDPI AG, 2019.

Abstract

Weaning stress can negatively impact a pig’s performance; dietary supplementation with omega-3 polyunsaturated fatty acids (n-3 PUFA) reduces inflammatory stress and promotes nursery pig’s health and growth. Fish oil (FO) is a major source of n-3 PUFA; however, microalgae (AL) may provide an alternative source of n-3 PUFA. The aim of this study was to assess the health benefits of supplementing a plant protein-based nursery diet with 3.12% AL or 1.25% FO providing equal total n-3 PUFA compared to a control (CON) diet. Seventy-two pigs were fed experimental diets for three weeks (phases 1 and 2), followed by a common standard diet for three weeks (phase 3). Following phase 2, 8 pigs per treatment underwent a lipopolysaccharide (LPS) immune stress challenge to assess the acute-phase response and 8 pigs per treatment were vaccinated with novel antigens to assess acquired immunity. No significant differences in piglets’ growth were observed, despite decreased feed intake in FO piglets compared to AL piglets in phase 3. AL supplementation tended to reduce, and FO supplementation significantly reduced the LPS-induced fever response. The AL pigs had significantly reduced cortisol responses, increased cytokine concentrations, and increased chromogranin A concentrations compared to FO and CON pigs following LPS challenge. Results suggest that AL or FO supplementation in nursery diets differentially modulate the acute-phase response, possibly due to different n-3 PUFA profiles between the two ingredients.

Details

Language :
English
ISSN :
20762615
Volume :
9
Issue :
3
Database :
Directory of Open Access Journals
Journal :
Animals
Publication Type :
Academic Journal
Accession number :
edsdoj.2728005abd4b4e2f8d67e6faef690700
Document Type :
article
Full Text :
https://doi.org/10.3390/ani9030080