EFFECT ON THE CORTISOL SERUM LEVEL OF GROWING PIGS SUPPLEMENTED WITH ESSENTIAL OIL OF Lippia alba

G. da Rosa, Luiz Sérgio Merlini, R. Magalhães, Wellington Henrique Bessi, Arianne Peruzo Pires Gonçalves Sereno, Paulo Henrique Sposito, Fabíola Gabriel da Silva
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Abstract

Animal welfare has become more important as the consumer market is increasingly demanding good conditions of handling production animals, especially in swine farming. There is also scientific evidence of economic losses due to animal stress during growth and before slaughter, reducing body weight, carcass yield and meat quality. Thus, natural and economically viable therapeutic alternatives were researched, such as the use of herbal medicines, aiming to minimize these negative effects on animals. With emphasis on Lippia alba, a plant commonly used in Brazilian medicine with proven efficacy as a relaxant and antiparasitic, anti-inflammatory, anesthetic and anti-stress for most animal species. The aim of this study was to evaluate the effect of L. alba essential oil supplementation on the reduction of serum cortisol levels in growing pigs and as a welfare parameter to evaluate these animals. Twelve F1 castrated pigs with an average weight of 12.3 kg were divided into two groups of six animals. Control group (A1) received saline solution at a dose of 1 mL.kg-1 and treatment group (A2) 0.5% L. alba essential oil at a dose of 1 mL.kg-1 on days 0, 30, 60 and 90 by gavage. During these time points, blood was collected from the auricular vessel to measure cortisol levels using the radioimmunoassay technique (Kit Cort-CT2). The administration of L. alba essential oil showed a significant anti-stress effect in growing pigs, significantly decreasing blood cortisol levels, an indicator of animal welfare.
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添加白脂精油对生长猪血清皮质醇水平的影响
动物福利变得越来越重要,因为消费市场越来越要求良好的处理生产动物的条件,特别是在养猪场。也有科学证据表明,动物在生长期间和屠宰前受到压力会造成经济损失,降低体重、胴体产量和肉质。因此,研究了自然和经济上可行的治疗方法,例如使用草药,旨在尽量减少这些对动物的负面影响。重点是Lippia alba,一种在巴西医学中常用的植物,对大多数动物物种具有松弛剂和抗寄生虫、抗炎、麻醉和抗应激的功效。本研究的目的是评估补充白桦精油对生长猪血清皮质醇水平降低的影响,并作为评估这些动物的福利参数。选取12头平均体重为12.3 kg的F1阉割猪,分为两组,每组6头。对照组(A1)给予生理盐水溶液1 mL.kg-1,治疗组(A2)给予0.5%白荷叶精油1 mL.kg-1,于第0、30、60、90天灌胃。在这些时间点,从耳廓血管采集血液,使用放射免疫测定技术(Kit Cort-CT2)测量皮质醇水平。白桦精油在生长猪中显示出显著的抗应激作用,显著降低血液皮质醇水平,这是动物福利的指标。
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