Dias E Silva Tairon Pannunzio, Ventoso Bompadre Thiago Francisco, Danasekaran Dinesh Kumar, Sakita Gabriel Zanuto, Abdalla Filho Adibe Luiz, Jimenez Carolina Rodrigues, de Campos Fonseca Pinto Ana Carolina Brandão, do Amarante Alessandro Francisco Talamini, McManus Concepta, Louvandini Helder
Laboratório de Nutrição Animal, Centro de Energia nuclear na Agricultura (CENA), Universidade de São Paulo, SP, Brazil.
Laboratório de Nutrição Animal, Centro de Energia nuclear na Agricultura (CENA), Universidade de São Paulo, SP, Brazil.
Vet Parasitol. 2019 Aug;272:17-22. doi: 10.1016/j.vetpar.2019.06.018. Epub 2019 Jul 2.
In this study we aimed to evaluate the effect of Trichostrongylus colubriformis infection on digesta passage rate, rumen fermentation and lamb performance. Eighteen three-month-old Santa Ines castrated male lambs (16.9 ± 1.43 kg of body weight) were randomly distributed in two experimental treatments: Infected with T. colubriformis (I, n = 9) and Uninfected (U, n = 9). The I lambs received a total of 45,000 L larvae of T. colubriformis (5,000 infective larvae, three times per week for three weeks). Daily feed intake was assessed using the I lambs as a reference for their respective pairs on the U group (pair-fed). Weight, body condition score and faeces (stool) samples were obtained every 15 days for 75 days. In both treatments, faecal egg count (FEC), digesta passage rate, rumen fermentation parameters, protozoa count and short chain fatty acids (SCFA) were evaluated. The lambs presented moderate infection (FEC = 620). The retention time of the digesta in the rumen-reticulum segment was lower (P < 0.05) in I lambs. The I lambs presented no inappetence, however, lower concentrations of total SCFA and butyrate, while higher acetate concentration were observed in these lambs (P < 0.05). The present findings highlight that T. colubriformis infection decreased the retention time (solid and liquid content) of the digesta in the rumen-reticulum, as well as negatively affected lamb growth.
在本研究中，我们旨在评估蛇形毛圆线虫感染对食糜通过率、瘤胃发酵和羔羊生产性能的影响。18只3月龄的圣伊内斯去势公羔羊（体重16.9±1.43千克）被随机分配到两种实验处理中：感染蛇形毛圆线虫（I组，n = 9）和未感染（U组，n = 9）。I组羔羊共接种45,000条蛇形毛圆线虫幼虫（5,000条感染性幼虫，每周3次，共3周）。以I组羔羊为参照，对U组相应配对羔羊进行每日采食量评估（配对饲养）。在75天内，每15天采集一次体重、体况评分和粪便样本。在两种处理中，均评估了粪蛋计数（FEC）、食糜通过率、瘤胃发酵参数、原虫计数和短链脂肪酸（SCFA）。羔羊呈现中度感染（FEC = 620）。I组羔羊瘤胃-网胃段食糜的停留时间较短（P < 0.05）。I组羔羊没有食欲不振的情况，然而，这些羔羊的总SCFA和丁酸浓度较低，而乙酸浓度较高（P < 0.05）。目前的研究结果表明，蛇形毛圆线虫感染降低了瘤胃-网胃中食糜（固体和液体成分）的停留时间，并且对羔羊生长产生了负面影响。
