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首页> 外文期刊>Canadian Veterinary Journal: La Revue Veterinaire Canadienne. >A comparison of 2 vaccination programs in feedlot calves at ultra-high risk of developing undifferentiated fever/bovine respiratory disease.
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A comparison of 2 vaccination programs in feedlot calves at ultra-high risk of developing undifferentiated fever/bovine respiratory disease.

机译：在有未分化发热/牛呼吸道疾病超高风险的育肥牛犊牛中进行的两种疫苗接种计划的比较。

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The aim of this study was to compare 2 vaccination programs in feedlot calves at ultra-high risk of developing undifferentiated fever (UF)/bovine respiratory disease (BRD). At feedlot arrival, 3882 calves were enrolled in the study and randomly allocated to 2 groups, which were housed by group in 12 pens. At the time of allocation, 1 group (MLV3-BT2) received a multivalent, modified-live viral vaccine containing infectious bovine rhinotracheitis virus (IBRV) and types I and II bovine viral diarrhea virus (BVDV), as well as a Mannheimia haemolytica (MH) and Pasteurella multocida bacterin-toxoid. The other group (MLV4-BT1) received a vaccine containing IIBRV, type I BVDV, bovine respiratory syncytial virus, and parainfluenza-3 virus, as well as a MH bacterin-toxoid. At an average of 69 days post arrival, the groups received their respective viral vaccines. The initial UF treatment, overall chronicity, overall wastage, overall mortality, and BRD mortality rates were significantly (P < 0.05) lower in the MLV3-BT2 group than in the MLV4-BT1 group. Average daily gain and the proportions of yield grade Canada 3 and quality grade E carcasses were significantly (P < 0.05) higher in the MLV3-BT2 group than in the MLV4-BT1 group. No significant (P > or = 0.05) difference in the dry matter intake to gain ratio was detected between the 2 groups. In economic terms, there was a net advantage of $20.86 CDN/animal in the MLV3-BT2 group. This study demonstrates that it is more cost effective to use an MLV3-BT2 vaccination program than a MLV4-BT1 vaccination program in feedlot calves at ultra-high risk of developing UF/BRD.
机译：这项研究的目的是比较育肥牛犊中的两种疫苗接种程序，这些程序在发生未分化发热（UF）/牛呼吸道疾病（BRD）的超高风险中。育肥场到来时，将3882头犊牛纳入研究，并随机分为2组，每组以12只圈舍饲养。在分配时，有1组（MLV3-BT2）接种了多价，改良活病毒疫苗，其中包含牛传染性鼻气管炎病毒（IBRV）和I型和II型牛病毒性腹泻病毒（BVDV）以及溶血曼海姆氏菌（ MH）和多杀巴斯德氏菌的类毒素。另一组（MLV4-BT1）接种了一种疫苗，其中含有IIBRV，I型BVDV，牛呼吸道合胞病毒和3型副流感病毒以及MH细菌类毒素。在抵达后平均69天，这些小组分别接种了病毒疫苗。与MLV4-BT1组相比，MLV3-BT2组的初始UF治疗，总体慢性病，总体浪费，总体死亡率和BRD死亡率显着降低（P <0.05）。 MLV3-BT2组的平均日增重和产量等级Canada 3和品质等级E cas体的比例显着（P <0.05）比MLV4-BT1组高。两组之间的干物质摄入量与增重率之间没有显着差异（P>或= 0.05）。从经济角度来看，MLV3-BT2组的净收益为每只动物20.86加元。这项研究表明，在超高发生UF / BRD风险的育肥牛犊中，使用MLV3-BT2疫苗接种计划比MLV4-BT1疫苗接种计划更具成本效益。

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