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Effects of pre-farrowing sow vaccination against on offspring colonisation and lung lesions. | LitMetric

Effects of pre-farrowing sow vaccination against on offspring colonisation and lung lesions.

Vet Rec

Unit Porcine Health Management, Department of Reproduction, Obstetrics & Herd Health, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.

Published: February 2019

AI Article Synopsis

Article Abstract

This study investigated colonisation and lung lesions at slaughter in pigs from vaccinated (V) and non-vaccinated (NV) sows, in two herds (A and B). In each herd, two sow batches were V against with a commercial bacterin at six and three weeks before farrowing and two sow batches remained NV. From each sow batch, laryngeal swabs were collected from the litters of five primiparous sows at weaning and seven days post-weaning. All samples were tested for by nested PCR. In total, 488 piglets were sampled. At slaughter, the extent of -like pneumonia lesions (lung lesion score (LLS)) was assessed. The colonisation rates with at weaning and seven days post-weaning were (V-A=14.2, NV-A=20.0 (P=0.225); V-B=0.9, NV-B=0.8 (P=0.948)) and (V-A=0.8, NV-A=7.0 (P=0.039); V-B=1.8, NV-B=2.5 (P=0.738)), respectively. The average LLS (in per cent) was V-A=15.5, NV-A=26.4 (P=0.021); V-B=9.7, NV-B=8.4 (P=0.541). In conclusion, in herd A, with a substantially higher level of piglet colonisation at weaning than herd B, offspring from V sows had a significantly lower colonisation rate seven days post-weaning and a significantly lower LLS at slaughter compared with the offspring of the NV sows. This implies that sow vaccination might be useful for control of infections, although significant results may not be achieved at all times (such as in herd B).

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6589467PMC
http://dx.doi.org/10.1136/vr.104972DOI Listing

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