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Comparing Visual-Only and Visual-Palpation Post-Mortem Lung Scoring Systems in Slaughtering Pigs.

Sergio Ghidini1, Silvio De Luca1, Elena Rinaldi1

  • 1Department of Food and Drug, University of Parma, Via del Taglio 10, 43126 Parma, Italy.

Animals : an Open Access Journal From MDPI
|August 12, 2023
PubMed
Summary

Comparing lung lesion scoring methods in pigs reveals the Blaha method is best for routine swine respiratory disease surveillance, while the Madec method offers more detail for farm-level respiratory and welfare assessments.

Keywords:
lungpigpost-mortem inspectionrespiratory diseasescoring schemesslaughter

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Area of Science:

  • Veterinary Pathology
  • Swine Production Medicine
  • Epidemiological Surveillance

Background:

  • Respiratory diseases are a major concern in pig production, impacting disease surveillance and epidemiological investigations.
  • Abattoir lung lesion assessment is valuable but faces challenges due to variations in methods, observers, and abattoirs, complicating study comparisons.
  • Limited research exists comparing different lung lesion scoring systems under field conditions.

Purpose of the Study:

  • To compare validated, simplified, and standardized schemes for assessing surface-related lung lesions in slaughtered pigs.
  • To analyze the reliability of these scoring methods under high-throughput abattoir field conditions.
  • To determine the suitability of different methods for routine surveillance versus detailed farm-level assessment.

Main Methods:

  • A comparative study was conducted in an Italian high-throughput abattoir.
  • Two distinct lung lesion scoring methods, Madec and Blaha, were benchmarked.
  • Statistical analysis was performed on data from 637 pig plucks.

Main Results:

  • A good agreement was observed between the Madec and Blaha methods for identifying severe or medium lung lesions.
  • Significant divergence was found in their ability to accurately identify healthy lungs and minor injuries.
  • The Blaha method showed higher suitability for routine surveillance, while the Madec method provided more detailed results.

Conclusions:

  • The Blaha scoring method is recommended for routine surveillance of swine respiratory diseases due to its efficiency.
  • The Madec scoring method provides more detailed and reliable data for assessing the respiratory and welfare status at the farm level.
  • Method selection should be based on the specific goals of surveillance or assessment in pig production.