de Vasconcelos Ângela Maria, Martins Thays Paulina, de Souza Viviane, Bonfim Joice Melo, Pompeu Roberto Cláudio Fernandes Franco, Façanha Débora Andréa Evangelista, Pereira Patrício Leandro, Ferreira Josiel, Silveira Robson Mateus Freitas
Department of Animal Science, State University of Vale do Acaraú, Sobral, CE, Brazil.
Brazilian Agricultural Research Corporation, Embrapa Caprinos and Ovinos, Sobral, CE, Brazil.
Trop Anim Health Prod. 2023 Mar 15;55(2):113. doi: 10.1007/s11250-023-03526-2.
Selenium is an important element in nutrition, showing great potential in the udder health of dairy goats and in the control of subclinical mastitis. However, there are few studies that evaluated the influence of selenium supplementation on subclinical mastitis in goats. The aim of this study was to evaluate the incidence of subclinical mastitis in dairy goats supplemented with organic selenium (Se yeast) in a semi-arid region. Sixteen Saanen × Toggenburg crossbred lactating goats were allocated randomly into two treatments: with and without addition of organic selenium (Se) to the concentrate. Milk samples were collected every 20 days from each udder half to determine the somatic cell count (SSC), chloride content, pH, electrical conductivity, microbiological isolation, composition, and selenium contents. The highest serum selenium concentrations in the blood of these goats occurred at 42 days of supplementation (P < 0.001). Goats which received organic selenium supplementation had higher serum selenium concentrations (P < 0.05). The milk composition variables did not differ (P > 0.05) between the tested treatments, teats, and collections. After 60 days of supplementation, a difference was observed (P < 0.05) between treatments for SSC, chloride content, and pH. Addition of organic selenium to the diet of dairy goats after 60 days of supplementation was promising in reducing the somatic cell count, consequently improving milk quality.
硒是营养中的一种重要元素，在奶山羊的乳房健康及亚临床型乳腺炎的控制方面显示出巨大潜力。然而，很少有研究评估补充硒对山羊亚临床型乳腺炎的影响。本研究的目的是评估在半干旱地区给奶山羊补充有机硒（硒酵母）后亚临床型乳腺炎的发病率。将16只萨能×吐根堡杂交泌乳山羊随机分为两组处理：在精料中添加和不添加有机硒。每隔20天从每个乳房的一半采集乳样，以测定体细胞计数（SSC）、氯含量、pH值、电导率、微生物分离、成分及硒含量。这些山羊血液中血清硒浓度在补充42天时最高（P<0.001）。接受有机硒补充的山羊血清硒浓度更高（P<0.05）。在所测试的处理、乳头及采集之间，乳成分变量无差异（P>0.05）。补充60天后，在SSC、氯含量和pH值方面观察到处理间存在差异（P<0.05）。在补充60天后给奶山羊的日粮中添加有机硒有望降低体细胞计数，从而提高乳品质。
