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. 2021 Jan 22;7(1):13.
doi: 10.1186/s40813-021-00192-4.

Correlation of Lawsonia intracellularis positivity in quantitative PCR and herd factors in European pig herds

Mirjam Arnold  1 , Annelies Crienen  2 , Hanny Swam  2 , Stephan V Berg  3 , Rika Jolie  4 , Heiko Nathues  5   6
Affiliations

Correlation of Lawsonia intracellularis positivity in quantitative PCR and herd factors in European pig herds

Mirjam Arnold et al. Porcine Health Manag. .

Abstract

Background: Lawsonia intracellularis is causing diarrhea, poor growth and sudden death in pigs. It can be found in most pig populations leading to large economic losses worldwide. Many potential risk factors for the occurrence of disease or seropositivity have been described. The current study therefore focused on herd characteristics in European countries associated with direct detection of the pathogen determined by quantitative polymerase chain reaction.

Results: A median number of less than 30 nursery pigs per pen was correlated to less positive nursery pigs (p < 0.01) and generally less samples positive per herd (p < 0.05) as well as a lower median of genome equivalents determined per herd (p < 0.05). Routine use of zinc oxide at/ around weaning, which was mentioned by 41.0% of all farmers, was correlated to higher number of positive nursery pigs (p < 0.01) as well as higher median genome equivalents determined per herd (p < 0.05). Slatted flooring of more than 78.0% of the surface in nursery units was correlated to lower number of positive animals (p < 0.05) and a lower median of genome equivalents per herd (p < 0.05). A weight of more than 7.8 kg at weaning was correlated to a higher number of positive growing pigs (p < 0.05) as well as general higher number of positive samples/ herd (p < 0.01).

Conclusions: Weaning and subsequent accommodation of nursery pigs seem to be of particular importance in prevention of infection with Lawsonia intracellularis and the spread of the pathogen within the herd.

Keywords: Control; Europe; Porcine proliferative enteropathy; Risk factor; Swine.

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Conflict of interest statement

The authors declare that they have no competing interests.

References

    1. Lawson GHK, Gebhart CJ. REVIEW: Proliferative Enteropathy. J Comp Pathol. 2000;122:77–100. Available from: http://www.idealibrary.com [cited 2018 Feb 13] - PubMed
    1. Jacobson M, Fellström C, Jensen-Waern M. Porcine proliferative enteropathy: An important disease with questions remaining to be solved. Vet J. 2010;184(3):264–268. Available from: https://ac.els-cdn.com/S109002330900207X/1-s2.0-S109002330900207X-main.p... [cited 2017 Nov 20] - PubMed
    1. Arnold M, Crienen A, Swam H, Von Berg S, Jolie R, Nathues H. Prevalence of Lawsonia intracellularis in pig herds in different European countries. Porc Heal Manag. 2019;5(31). - PMC - PubMed
    1. Wendt M, Schulze Johann R, Verspohl J. Epidemiologische Untersuchungen zum Vorkommen von Lawsonia-intracellularis -Infektionen in Schweinebeständen. Tierärztl Prax. 2006;34:230–9. doi: 10.1055/s-0037-1621074. - DOI
    1. Mcorist S, Jasni S, Mackie RA, Macintyre N, Neef N, Lawson GHK. Reproduction of Porcine Proliferative Enteropathy with Pure Cultures of Ileal Symbiont Intracellularis. Infect Immun. 1993 Vol. 61. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC281156/pdf/iai00022-0274.pdf [cited 2018 Aug 14] - PMC - PubMed