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RESEARCH ARTICLE

Influence of the housing environment during sow gestation on maternal health, and offspring immunity and survival

Elodie Merlot A C , Catherine Calvar B and Armelle Prunier A
+ Author Affiliations
- Author Affiliations

A PEGASE, Agrocampus Ouest, INRA, 35590 Saint-Gilles, France.

B Pôle Porcs-Aviculture, Chambre d’Agriculture de Bretagne, Maison de l’Agriculture, BP 398, F-56 009 Vannes cedex, France.

C Corresponding author. Email: Elodie.Merlot@rennes.inra.fr

Animal Production Science 57(8) 1751-1758 https://doi.org/10.1071/AN15480
Submitted: 24 August 2015  Accepted: 14 April 2016   Published: 8 August 2016

Abstract

In pig husbandry, pregnant females are often exposed to stressful conditions that may affect their physiology, behaviour or health and consequently the ability of their offspring to survive and develop. This study compared two different housing systems from insemination to 106 days of gestation, a conventional (C) and an enriched one (E), for maternal cortisol and immune parameters, as well as for the immune function and survival of their offspring. The C and E systems differed essentially for the housing design (slatted floor, 2.4 m2 per sow vs a deep straw litter and 3.4 m2 per sow). Results from Expt 1 (n = 108) demonstrated that C sows had higher salivary cortisol than E sows at gestational Day 102 (DG 102). Results from Expt 2 (n = 48) showed that, at DG 102, C sows had higher granulocyte counts and total plasma immunoglobulin G concentration than E sows, whereas lymphocyte number, haematocrit and haptoglobin plasma concentration were similar. Results from Expt 3 (n = 47) showed that plasma immunoglobulin G level at 5 and 27 days of age, hematocrit, white blood cell numbers and in vitro lymphocyte proliferation of piglets at 27 days of age were not influenced by maternal housing conditions. However, reproductive data collected in Expt 2 and 3 indicated that pre-weaning mortality was higher in C than E litters. In conclusion, the C system was associated with markers of increased stress and microbial aggression in gestating sows, and with greater piglet mortality during the suckling period without identified alterations in piglet immune function.

Additional keywords: management, neonate, pig.


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