Ferreira Maria Francisca, Fàbrega Emma, Pires Isabel, Vieira-Pinto Maria Madalena
School of Agrarian and Veterinary Sciences (ECAV), University of Trás-os-Montes and Alto Douro (UTAD), 5001-801 Vila Real, Portugal.
Animal Welfare Program, IRTA, 17121 Monells, Spain.
Animals (Basel). 2023 Jul 13;13(14):2292. doi: 10.3390/ani13142292.
Agonic aspiration of blood (AAB) may result from an inadequate exsanguination with accidental trachea severing, that can be favoured by ineffective stunning of pigs (). This study aimed to evaluate AAB as an animal-based indicator of electrical stunning ineffectiveness, which could be used by official veterinarians during the post-mortem inspection of pigs. Information on 3584 finishing pigs was collected at a Portuguese abattoir that performs head-to-body electrical stunning with horizontal bleeding. Of them, 15.5% of the pigs presented signs of ineffective stunning. AAB lung lesions were found in 27.8% of lungs. Despite what was predicted, a strong correlation was found between well stunned animals and the presence of blood lesions in lungs ( = 0.006). Statistical significances were found between pigs' lateral recumbency at the conveyor and the presence of blood affecting one lung. Under the conditions of this study, the authors cannot point to AAB lung lesions as an animal-based indicator of electrical stunning ineffectiveness. Further studies should be conducted to establish a better understanding of the causes of aspiration of blood, in particular how horizontal bleeding may affect the occurrence of similar lesions.
无痛性血液吸入（AAB）可能是由于放血不充分以及意外切断气管所致，而猪电击昏无效可能会助长这种情况（）。本研究旨在评估AAB作为电击昏无效的基于动物的指标，官方兽医在猪的宰后检验中可以使用该指标。在一家采用头部到身体水平放血电击昏方式的葡萄牙屠宰场收集了3584头育肥猪的信息。其中，15.5%的猪表现出电击昏无效的迹象。在27.8%的肺中发现了AAB肺部病变。尽管与预期不符，但在电击昏良好的动物与肺部血液病变的存在之间发现了强相关性（=0.006）。在传送带上猪侧卧与影响一侧肺的血液存在之间发现了统计学意义。在本研究条件下，作者不能将AAB肺部病变作为电击昏无效的基于动物的指标。应进行进一步研究，以更好地了解血液吸入的原因，特别是水平放血如何可能影响类似病变的发生。
