背景:肉类检查数据通常用于监测商业肉鸡生产中的健康和福利;但是,在图层中使用较少。屠宰场记录可以提供对动物和畜群健康的洞察,并确定重要的健康和福利挑战。为了获得有关产蛋鸡商业鸟舍健康问题的知识,这项重复的横断面研究的目的是描述car体谴责的发生和原因,包括死者(DOA),在挪威的商业鸟舍中,并探讨DOA与car体谴责次数之间的季节模式和相关性。
结果:2018年1月至2020年12月的数据来自挪威的一个家禽屠宰场。总的来说,在此期间,从98个羊群和56个农场的101个屠宰批次中屠宰了759,584层。总的来说,33,754(4.4%)层被谴责,包括DOA。最常见的car体谴责原因是(占所有屠宰层的百分比):脓肿/蜂窝织炎(2.03%),腹膜炎(0.38%),DOA(0.22%),消瘦(0.22%),变色/气味(0.21%),急性皮损(0.21%)和腹水(0.17%)。回归分析显示,与其他季节相比,冬季总car体谴责的患病率估计更高。
结论:本研究中发现的三种最常见的谴责原因是:脓肿/蜂窝织炎,腹膜炎,DOA。我们发现谴责和DOA的原因在批次之间存在很大差异,表明预防是可能的。结果可用于指导和指导有关图层健康和福利的进一步研究。
BACKGROUND: Meat inspection data is commonly used to monitor health and welfare in commercial broiler production; however, less used in layers. Slaughterhouse records can provide insight into animal and herd health and identify important health and welfare challenges. To gain knowledge of health issues in commercial aviary housed laying hens, the aim of this repeated cross-sectional study was to describe the occurrence and causes of carcass condemnation, including dead-on-arrivals (
DOA), in commercial aviary housed layers in Norway, and to explore seasonal patterns and correlation between
DOA and number of carcass condemnations.
RESULTS: Data from January 2018 to December 2020 were collected from one poultry abattoir in Norway. In total, 759,584 layers were slaughtered during this period in 101 slaughter batches from 98 flocks and 56 farms. In total, 33,754 (4.4%) layers were condemned, including the
DOA. The most common carcass condemnation causes were (percent of all slaughtered layers): abscess/cellulitis (2.03%), peritonitis (0.38%), DOA (0.22%), emaciation (0.22%), discoloration/smell (0.21%), acute skin lesions (0.21%) and ascites (0.17%). Regression analysis showed an estimated higher prevalence of total carcass condemnation during winter compared to the other seasons.
CONCLUSIONS: The three most common condemnation causes found in the present study were: abscess/cellulitis, peritonitis, and
DOA. We found a large between-batch variation in causes of condemnation and
DOA indicating that prevention might be possible. The results can be used to inform and guide further studies on layer health and welfare.