Publicação
Gross lesions detected during poultry post-mortem inspection at the slaughterhouse
| Resumo: | Meat inspection (MI) is an official control process that includes a set of tasks performed at slaughterhouses and sometimes at farms by Official Veterinarians (OV). Its biggest purpose is to ensure that animals enter the food chain in accordance with the legal hygiene, health and welfare requirements. Additionally, the evaluation of data resulting from poultry ante and post-mortem inspections at the slaughterhouse is an important tool to determine animal health and welfare surveillance. Regarding the latter topic, animal welfare (AW), the implementation of Directive 2007/43/EC requires the use of a system of assessment for poultry welfare at the slaughterhouse level by OV. Based on these facts, the scopes of this study were to accompany the slaughter process of different types of poultry (free-range chicken, broilers, laying hens and quails) and evaluate: - The causes of post-mortem condemnation for the four groups of poultry studied; - The risk factors for total carcass condemnation - “Flock uniformity" as a possible indicator of AW in free-range chickens and broilers; In the present study, the results for free-range chicken showed that worse uniformity had a highly significant association with increased rejection rates (p <0001) and increased rejection rates caused by disease (p <0.001) Similar results were found in broilers highlighting the potential use of this parameter as an animal welfare indicator as well as criteria to be used under a risk-based MI approach: the worse the FU, the more time the OV must dedicate to the post mortem inspection of that flock. Opposed to what was found in FU, foodpat dermatitis does not demonstrate positive association with the rate of condemnation. This study means to warn on the importance of the MI to the surveillance of animal health and welfare along with the necessity of future studies in indicators to improve AW. In a comparative way, laying hens were the animals with the highest rates of condemnation (p <0001) as well as the highest rates of condemnation by trauma and ascites (p=0.001), which can indicate poorer welfare in the production chain. |
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| Autores principais: | Saraiva, Cândido Lourenço |
| Assunto: | animal welfare welfare indicators |
| Ano: | 2020 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Trás-os-Montes e Alto Douro |
| Idioma: | inglês |
| Origem: | Repositório da UTAD |
| Resumo: | Meat inspection (MI) is an official control process that includes a set of tasks performed at slaughterhouses and sometimes at farms by Official Veterinarians (OV). Its biggest purpose is to ensure that animals enter the food chain in accordance with the legal hygiene, health and welfare requirements. Additionally, the evaluation of data resulting from poultry ante and post-mortem inspections at the slaughterhouse is an important tool to determine animal health and welfare surveillance. Regarding the latter topic, animal welfare (AW), the implementation of Directive 2007/43/EC requires the use of a system of assessment for poultry welfare at the slaughterhouse level by OV. Based on these facts, the scopes of this study were to accompany the slaughter process of different types of poultry (free-range chicken, broilers, laying hens and quails) and evaluate: - The causes of post-mortem condemnation for the four groups of poultry studied; - The risk factors for total carcass condemnation - “Flock uniformity" as a possible indicator of AW in free-range chickens and broilers; In the present study, the results for free-range chicken showed that worse uniformity had a highly significant association with increased rejection rates (p <0001) and increased rejection rates caused by disease (p <0.001) Similar results were found in broilers highlighting the potential use of this parameter as an animal welfare indicator as well as criteria to be used under a risk-based MI approach: the worse the FU, the more time the OV must dedicate to the post mortem inspection of that flock. Opposed to what was found in FU, foodpat dermatitis does not demonstrate positive association with the rate of condemnation. This study means to warn on the importance of the MI to the surveillance of animal health and welfare along with the necessity of future studies in indicators to improve AW. In a comparative way, laying hens were the animals with the highest rates of condemnation (p <0001) as well as the highest rates of condemnation by trauma and ascites (p=0.001), which can indicate poorer welfare in the production chain. |
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