Ranjitkar Samir, Engberg Ricarda Margarete
a Department of Animal Science (Immunology & Microbiology) , Aarhus University , Tjele , Denmark.
Avian Pathol. 2016;45(2):253-60. doi: 10.1080/03079457.2016.1146821.
An infection trial and a production trial over 35 days were conducted in parallel to study the influence of feeding crimped kernel maize silage (CKMS) on the intestinal Campylobacter jejuni colonization and broiler performance, respectively. The CKMS was used at dietary inclusion levels of 15% and 30% in maize-based diets. Broilers were orally inoculated with 2 × 10(5) log cfu/ml C. jejuni on day 14. Four birds from each pen were randomly selected and killed by cervical dislocation on days 3, 6, 9, 14 and 21 post infection and intestinal contents from ileum, caeca and rectum as well as liver samples were taken. Body weight and feed consumption of broilers were registered on days 13, 22 and 35. On day 35, litter dry matter (DM) was measured and the condition of the foot pads was evaluated. There was no significant effect of CKMS on the colonization of C. jejuni. Body weight of the broilers supplemented with 15% CKMS was comparable with the control maize-based feed, whereas addition of 30% CKMS reduced broiler body weight (P < 0.001). However, DM intake and feed conversion ratio were the same in all three dietary treatments. Furthermore, the foot pad condition of broilers significantly improved with the inclusion of CKMS on broiler diets as a result of a higher DM content in the litter material. It is concluded that CKMS did not influence intestinal Campylobacter colonization, but improved the foot pad health of broilers.
同时进行了一项为期35天的感染试验和生产试验，分别研究饲喂压纹玉米粒青贮饲料（CKMS）对空肠弯曲杆菌在肠道内定植以及肉鸡生产性能的影响。在以玉米为基础的日粮中，CKMS的添加水平分别为15%和30%。在第14天，给肉鸡口服接种2×10⁵ log cfu/ml的空肠弯曲杆菌。在感染后第3、6、9、14和21天，从每个鸡栏中随机选取4只鸡，通过颈椎脱臼法处死，采集回肠、盲肠和直肠的肠内容物以及肝脏样本。在第13、22和35天记录肉鸡的体重和采食量。在第35天，测量垫料干物质（DM）含量并评估脚垫状况。CKMS对空肠弯曲杆菌的定植没有显著影响。添加15% CKMS的肉鸡体重与以玉米为基础的对照饲料相当，而添加30% CKMS则降低了肉鸡体重（P<0.001）。然而，在所有三种日粮处理中，干物质摄入量和饲料转化率相同。此外，由于垫料中DM含量较高，在肉鸡日粮中添加CKMS后，肉鸡的脚垫状况显著改善。得出的结论是，CKMS不影响肠道空肠弯曲杆菌的定植，但改善了肉鸡的脚垫健康状况。
