Limits...
A simplified evaluation system of surface-related lung lesions of pigs for official meat inspection under industrial slaughter conditions in Germany.

Steinmann T, Blaha T, Meemken D - BMC Vet. Res. (2014)

Bottom Line: Most frequent inter-rater disagreements greater than 75% were found for moderate pneumonia.Results of the post-training investigation based on 4,646 lungs showed a significantly improved reliability of lung lesion evaluation and the inter-rater agreement increased in all respects.Especially the disagreement of recording moderate cases of pneumonia decreased in total to 15% deviations from reference.

View Article: PubMed Central - HTML - PubMed

Affiliation: Institute for Food Quality and Food Safety, University of Veterinary Medicine Hannover, Foundation, Bischofsholer Damm 15, D-30173 Hannover, Germany. diana.meemken@tiho-hannover.de.

ABSTRACT

Background: European and national administrative legislation require objective evaluation systems for organ lesions at pig slaughter. These results can be used as basis for herd health improvement programs by farmers and their consulting veterinarians. Various studies have shown that the current evaluation and recording of lesions by authorized meat inspectors are not reliable and produce significant inter-rater disagreement especially for lung lesions in pigs. The objectives of this study were to increase the usability of official meat inspection data by a developed and validated scheme and to analyze potential improvements in the reliability of the proposed system under industrialized slaughter conditions.

Results: A simplified evaluation scheme for surface-related lung lesions was developed based on morphometric evaluations of unaffected lungs with quantitative relationships of each lobe to the whole lung ("Rule of Tens"). Furthermore, a theoretical as well as a hands-on training program for meat inspectors was developed and applied. Based on 5,183 lungs, the authors established a baseline of the inter-rater reliability of current routine assessments of lung lesions as documented by meat inspectors compared with the assessments of an independent veterinarian using the developed simplified evaluation scheme. Most frequent inter-rater disagreements greater than 75% were found for moderate pneumonia. Sources of the deviations most frequently included misinterpretations of technical artifacts, which were erroneously assessed by the meat inspectors as pneumonic lung lesions. Results of the post-training investigation based on 4,646 lungs showed a significantly improved reliability of lung lesion evaluation and the inter-rater agreement increased in all respects. Especially the disagreement of recording moderate cases of pneumonia decreased in total to 15% deviations from reference.

Conclusions: The presented simplified lung evaluation scheme showed its capability to standardize the evaluation of lung lesions according to administrative legislation under industrialial slaughter conditions. The reliability of official meat inspections can be significantly increased with the help of the presented scheme to assess surface-related lung lesions of slaughter pigs. Continuous standardization and optimization can be achieved by personalized training programs in the framework of quality assurance systems for meat inspectors.

Show MeSH

Related in: MedlinePlus

Status-quo and Post-training deviations of AQAs* from the OV (Reference) per day in PN0.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4016671&req=5

Figure 3: Status-quo and Post-training deviations of AQAs* from the OV (Reference) per day in PN0.

Mentions: The deviations in the daily assessment periods were much larger as shown below (cf. Table 3, Figures 3 and 4). The extent of deviations was largest on the very first day of observation (Monday, 25.07). Subsequently, deviations ranged from an over-scoring of PN2 by 348.6% on the first observation day of the status-quo investigation to an under-scoring of PN3 by 50.0% on the last observation day. Within the keys, PN2 was consistently over-scored ranging from + 7.3% to + 348.6% on all observation days, whereas PN3 was under-scored during the last 6 observation periods ranging from - 18.2% to - 50.0% (cf. Table 3 and Figure 4). For key PN0, Mondays seemed to be generally more burdened with deviations than other days of the week.


A simplified evaluation system of surface-related lung lesions of pigs for official meat inspection under industrial slaughter conditions in Germany.

Steinmann T, Blaha T, Meemken D - BMC Vet. Res. (2014)

Status-quo and Post-training deviations of AQAs* from the OV (Reference) per day in PN0.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4016671&req=5

Figure 3: Status-quo and Post-training deviations of AQAs* from the OV (Reference) per day in PN0.
Mentions: The deviations in the daily assessment periods were much larger as shown below (cf. Table 3, Figures 3 and 4). The extent of deviations was largest on the very first day of observation (Monday, 25.07). Subsequently, deviations ranged from an over-scoring of PN2 by 348.6% on the first observation day of the status-quo investigation to an under-scoring of PN3 by 50.0% on the last observation day. Within the keys, PN2 was consistently over-scored ranging from + 7.3% to + 348.6% on all observation days, whereas PN3 was under-scored during the last 6 observation periods ranging from - 18.2% to - 50.0% (cf. Table 3 and Figure 4). For key PN0, Mondays seemed to be generally more burdened with deviations than other days of the week.

Bottom Line: Most frequent inter-rater disagreements greater than 75% were found for moderate pneumonia.Results of the post-training investigation based on 4,646 lungs showed a significantly improved reliability of lung lesion evaluation and the inter-rater agreement increased in all respects.Especially the disagreement of recording moderate cases of pneumonia decreased in total to 15% deviations from reference.

View Article: PubMed Central - HTML - PubMed

Affiliation: Institute for Food Quality and Food Safety, University of Veterinary Medicine Hannover, Foundation, Bischofsholer Damm 15, D-30173 Hannover, Germany. diana.meemken@tiho-hannover.de.

ABSTRACT

Background: European and national administrative legislation require objective evaluation systems for organ lesions at pig slaughter. These results can be used as basis for herd health improvement programs by farmers and their consulting veterinarians. Various studies have shown that the current evaluation and recording of lesions by authorized meat inspectors are not reliable and produce significant inter-rater disagreement especially for lung lesions in pigs. The objectives of this study were to increase the usability of official meat inspection data by a developed and validated scheme and to analyze potential improvements in the reliability of the proposed system under industrialized slaughter conditions.

Results: A simplified evaluation scheme for surface-related lung lesions was developed based on morphometric evaluations of unaffected lungs with quantitative relationships of each lobe to the whole lung ("Rule of Tens"). Furthermore, a theoretical as well as a hands-on training program for meat inspectors was developed and applied. Based on 5,183 lungs, the authors established a baseline of the inter-rater reliability of current routine assessments of lung lesions as documented by meat inspectors compared with the assessments of an independent veterinarian using the developed simplified evaluation scheme. Most frequent inter-rater disagreements greater than 75% were found for moderate pneumonia. Sources of the deviations most frequently included misinterpretations of technical artifacts, which were erroneously assessed by the meat inspectors as pneumonic lung lesions. Results of the post-training investigation based on 4,646 lungs showed a significantly improved reliability of lung lesion evaluation and the inter-rater agreement increased in all respects. Especially the disagreement of recording moderate cases of pneumonia decreased in total to 15% deviations from reference.

Conclusions: The presented simplified lung evaluation scheme showed its capability to standardize the evaluation of lung lesions according to administrative legislation under industrialial slaughter conditions. The reliability of official meat inspections can be significantly increased with the help of the presented scheme to assess surface-related lung lesions of slaughter pigs. Continuous standardization and optimization can be achieved by personalized training programs in the framework of quality assurance systems for meat inspectors.

Show MeSH
Related in: MedlinePlus