Pig Development Department, Teagasc Animal and Grassland Research and Innovation Centre, Moorepark, Fermoy, County Cork, Ireland; School of Veterinary Medicine, University College Dublin, Belfield, Dublin, Ireland.
School of Veterinary Medicine, University College Dublin, Belfield, Dublin, Ireland.
Prev Vet Med. 2016 May 1;127:21-6. doi: 10.1016/j.prevetmed.2016.03.004. Epub 2016 Mar 10.
Tail lesions are associated with poor health either because they serve as a point of entry for pathogens or because of shared risk factors. This study investigated the relationship between carcass tail lesion and lung lesion severity scores in slaughter pigs. Carcasses were scored after scalding/dehairing for tail lesion severity (0-4). Lungs were scored according to an adapted version of the BPEX pig health scheme. Severity of enzootic pneumonia (EP-like lesions) was recorded on a scale of 0-50. Severity of pleurisy was scored on a 0-2 scale with score 2 equating to severe pleurisy or those lungs that remained attached to the chest wall ('lungs in chest'). The database for assessing pleurisy lesions contained all pleurisy scores (n=5628). Lungs with a score of 2 for pleurisy were excluded from the analysis of all other lung lesions as such lungs could not be assessed for other lesions (n=4491). Associations between tail lesions and different lung lesion outcomes were analysed using generalized linear mixed models (PROC GLIMMIX) with random effect for batch. Males were more affected by moderate (OR=1.9, 95% CI 1.51-2.34) and severe (OR=5.8, 95% CI 3.45-9.70) tail lesions than females. EP-like lesions and pleurisy were most commonly observed. Pigs with severe tail lesions tended to have more 'lungs in chest' than pigs with moderate tail lesions (P=0.1). No other associations between tail lesions and lung lesions were found. Males had higher odds of having EP-like lesions (OR=1.2, 95% CI 1.05-1.36) than females. Tail lesions on the carcass may not be an accurate predictor of lung health. However, tail lesions are important welfare indicators and respiratory disease is a significant infectious condition affecting pigs. Thus, recording of tail and lung lesions at meat inspection provides valuable information regarding on-farm health and welfare of pigs.
尾部病变与健康状况不佳有关，要么是因为它们成为病原体进入的途径，要么是因为存在共同的风险因素。本研究调查了屠宰猪胴体尾部病变与肺部病变严重程度评分之间的关系。在烫毛/去毛后，对尾部病变严重程度（0-4 级）进行评分。根据 BPEX 猪健康方案的改编版对肺部进行评分。对地方性肺炎（类似 EP 的病变）的严重程度进行记录，范围为 0-50。胸膜炎的严重程度按 0-2 级评分，2 级表示严重胸膜炎或那些仍附着在胸壁上的肺部（“肺部在胸腔中”）。评估胸膜炎病变的数据库包含所有胸膜炎评分（n=5628）。对于胸膜炎评分为 2 分的肺部，在分析所有其他肺部病变时将其排除在外，因为这些肺部无法评估其他病变（n=4491）。使用带有批次随机效应的广义线性混合模型（PROC GLIMMIX）分析尾部病变与不同肺部病变结果之间的关系。雄性比雌性更容易受到中度（OR=1.9，95%CI 1.51-2.34）和严重（OR=5.8，95%CI 3.45-9.70）尾部病变的影响。类似 EP 的病变和胸膜炎最常见。与中度尾部病变的猪相比，严重尾部病变的猪更容易出现“肺部在胸腔中”（P=0.1）。没有发现尾部病变与肺部病变之间的其他关联。雄性比雌性更容易出现类似 EP 的病变（OR=1.2，95%CI 1.05-1.36）。胴体上的尾部病变可能不是肺部健康的准确预测指标。然而，尾部病变是重要的福利指标，呼吸道疾病是影响猪的重要传染病。因此，在肉品检验中记录尾部和肺部病变提供了有关农场健康和猪福利的有价值信息。
