de Melo Gleice Kelli Ayardes, Ítavo Camila Celeste Brandão Ferreira, Monteiro Kedma Leonora Silva, da Silva Jonilson Araújo, da Silva Pâmila Carolini Gonçalves, Ítavo Luís Carlos Vinhas, Borges Dyego Gonçalves Lino, de Almeida Borges Fernando
Faculdade de Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso do Sul, Avenida Senador Filinto Müller, 2,443, Campo Grande, CEP 79074-460, Mato Grosso do Sul, Brazil.
Faculdade de Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso do Sul, Avenida Senador Filinto Müller, 2,443, Campo Grande, CEP 79074-460, Mato Grosso do Sul, Brazil.
Vet Parasitol. 2017 May 30;239:26-30. doi: 10.1016/j.vetpar.2017.04.017. Epub 2017 Apr 15.
This study evaluated the effect of creep feeding a protein supplement on the susceptibility of suckling lambs to infection with gastrointestinal helminths. Male and female lambs were grazed on Brachiaria spp. pastures next to their mothers. Animals were allocated to one of two treatments: creep feeding (261g/d) and control (no supplementation). The trial period was the suckling of lambs during two years of study: May-October 2013 and March-July 2014. Supplementary creep feeding of lambs improved animal performance (P<0.05). Creep-fed lambs reached 18kg body weight in 64 d, but unsupplemented lambs required 77 d to reach the same weight. Lambs were susceptible to helminth infection during lactation; lambs in both treatments had high fecal egg counts (FECs), with means >1000 eggs per gram, as early as 45days of age, when the daily grazing time per animal increased. Creep feeding reduced the FECs of suckling lambs >60days of age in infections dominated by Haemonchus contortus. Totals of 20 and 48 anthelmintic treatments were administered to the supplemented and unsupplemented animals, respectively. The effect of this variable, however, was significant (P<0.05) only after 60days, when nine and 28 treatments had been administered to the supplemented and unsupplemented lambs, respectively. The number of strongyloid larvae recovered from the paddock did not differ significantly (P >0.05) between the two treatments, indicating similar challenges by infective larvae to both groups. The supplementation of lambs by creep feeding can thus be a strategy for the sustainable control of helminth infection, because it reduces the dependence on anthelmintic treatment.
本研究评估了给哺乳羔羊补饲蛋白质补充料对其胃肠道蠕虫感染易感性的影响。雄性和雌性羔羊与其母亲一起在臂形草属牧场放牧。动物被分配到两种处理之一：补饲（261克/天）和对照（不补充）。试验期为两年研究期间羔羊的哺乳期：2013年5月至10月和2014年3月至7月。给羔羊补饲补充料可提高动物性能（P<0.05）。补饲的羔羊在64天达到18千克体重，但未补饲的羔羊需要77天才能达到相同体重。羔羊在哺乳期易受蠕虫感染；两种处理的羔羊粪便虫卵计数（FECs）都很高，早在45日龄时，每克粪便虫卵平均数>1000个，此时每只动物的每日放牧时间增加。在以捻转血矛线虫为主的感染中，补饲可降低60日龄以上哺乳羔羊的FECs。分别给补饲和未补饲的动物进行了20次和48次驱虫处理。然而，只有在60天后，这个变量的影响才显著（P<0.05），此时补饲和未补饲的羔羊分别进行了9次和28次处理。从围场中回收的类圆线虫幼虫数量在两种处理之间没有显著差异（P>0.05），表明感染性幼虫对两组的挑战相似。因此，给羔羊补饲可以作为蠕虫感染可持续控制的一种策略，因为它减少了对驱虫处理的依赖。
