Context of the Problem
Lung lesions are among the most common findings in pig carcasses at slaughterhouses. They serve as key indicators for respiratory disease and can result from infections caused by various pathogens (most commonly Mycoplasma hyopneumoniae) as well as from the inhalation of harmful gases such as ammonia. Affected pigs may show symptoms such as coughing, breathing difficulties and fever. These lesions not only raise serious animal welfare concerns by signalling poor environmental conditions like poor air quality, but they also have significant economic consequences. Respiratory diseases can lead to financial losses through increased medical costs, reduced feed conversion and growth rates, and ultimately a lower carcass quality. Additionally, treatment of lung diseases often involves the use of antibiotics which can contribute to antimicrobial resistance.
Monitoring and aWISH Project
Lung lesion monitoring is a standard procedure at slaughterhouses due to their high prevalence in pigs. Scoring these lesions can provide an overview of herd-level respiratory health and identify problems on-farm. As part of the aWISH project, automated systems to detect coughing on farm as well as lung lesions at the slaughterhouse are being developed. Consistent feedback via the aWISH data platform enables farmers to monitor the prevalence of lesions and provides an overview of pig welfare for each farm. Furthermore, aWISH also focuses on environmental monitoring on farm, including automatic assessments of air quality and noxious gas concentrations, which are important for supporting animal health and welfare.
Best Practices
To reduce lung lesions and respiratory diseases in pigs, it is crucial to focus on animal hygiene. Improvements in biosecurity, including all-in, all-out systems and separating sick from healthy animals, reduce pathogens and therefore the spread of infections. On-farm health monitoring, e.g. through cough detection, and close cooperation with veterinarians should further be implemented. Welfare conditions can also be improved by focusing on a good barn climate. Ammonia and dust should be reduced while ventilation should be monitored and improved if necessary. Best Practices include the provision of fresh air, a nitrogen-reduced diet as well as regular drainage/slurry removal. These improvements not only support animal welfare but also enhance overall farm productivity.
Find out more about Best Practices regarding lung lesions in our Best Practice Guide
