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This summary is machine-generated.

Smaller pig farms (<400 sows) show lower incidence of piglet diarrhoea (scours), a costly disease often caused by enterotoxigenic Escherichia coli (ETEC). Reducing piglets per pen may decrease scours, with other livestock potentially posing a risk.

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Area of Science:

  • Veterinary Epidemiology
  • Animal Health Management
  • Microbial Ecology

Background:

  • Diarrhoeal disease (scours) in piglets, frequently linked to enterotoxigenic Escherichia coli (ETEC), imposes significant economic losses on the global swine industry.
  • Existing research has not comprehensively investigated the interplay between farm, pen, and microbiological factors influencing scours incidence.
  • Understanding these relationships is crucial for developing effective disease prevention and control strategies in pig production.

Purpose of the Study:

  • To identify direct and indirect associations between farm and pen management factors and the risk of scours in pre- and post-weaned piglets.
  • To construct a robust analytical model for elucidating the complex relationships between risk factors.
  • To provide evidence-based recommendations for reducing scours incidence in pig herds.

Main Methods:

  • Utilized a Bayesian Network to determine the optimal structural model for risk factor associations.
  • Employed an additive model to calculate epidemiologically relevant odds ratios for identified risk factors.
  • Analyzed data considering farm-level and pen-level variations to assess their respective impacts on scours.

Main Results:

  • Farm-level variance was the dominant factor, diminishing many pen-level associations.
  • A statistically significant reduction in pre-weaning scours was observed on farms with fewer than 400 sows (OR = 0.14, 95% CI: 0.03-0.50).
  • Smaller production units (fewer piglets per pen) and the presence of other livestock on farms were identified as potential factors influencing scours, though the latter requires further investigation.

Conclusions:

  • Farm size, specifically smaller herd sizes, appears to be a significant factor in reducing piglet scours.
  • Optimizing stocking density (piglets per pen) is a viable strategy for mitigating scours incidence.
  • Further research is warranted to explore the impact of herd size and the management of other livestock on piglet scours and overall herd health.