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首页> 外文期刊>Vaccine >A field study evaluating health, performance, and behavior differences in crossbred beef calves administered different vaccine-parasiticide product combinations.
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A field study evaluating health, performance, and behavior differences in crossbred beef calves administered different vaccine-parasiticide product combinations.

机译：一项现场研究评估了杂交牛犊的健康，性能和行为差异，使用了不同的疫苗-杀寄生虫产品组合。

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Bovine respiratory disease complex (BRDC) is the most important health issue in beef feeder calves. Our study was a randomized, blinded field trial to evaluate potential differences in health, production and behavior in feeder calves administered two different preventive health programs. Calves in two replicates (n=308 and n=305) were allocated to pens and then pens were randomly assigned a preventive health program. One program (Prog1) consisted of 1 injectable clostridial vaccine, 1 intranasal modified live respiratory vaccine, 1 topical and 1 oral parasiticide. The other program (Prog2) consisted of 1 injectable clostridial vaccine, 1 modified live respiratory vaccine and 1 injectable parasiticide. A greater percentage of calves in Prog1 (59.7%) experienced BRDC morbidity compared to the Prog2 program (47.8%). There were no differences between programs in mortality, case fatality, 1st treatment success or chronicity risks. The average daily gain over the entire study period for the Prog2 calves (1.23 kg) was greater than the Prog1 calves (1.16 kg). Calves administered Prog1 on average took more steps each day during the first 28 days of the study. Additionally, Prog1 calves spent more time lying down on certain days during the last 14 days of the study. During initial program administration, fewer Prog1 calves (39.8%) vocalized compared to Prog2 calves (47.8%). In this study, calves administered a program with fewer injections indicated less aversion to program administration than those administered more injections, but experienced greater morbidity and poorer performance.
机译：牛呼吸系统疾病综合症（BRDC）是牛肉饲养犊牛中最重要的健康问题。我们的研究是一项随机，无盲实验，旨在评估实施两种不同预防性健康计划的小牛犊在健康，生产和行为方面的潜在差异。将两头小牛（ n = 308和 n = 305）分配给钢笔，然后为钢笔随机分配预防性健康计划。一个程序（Prog1）包括1种可注射的梭菌疫苗，1种鼻内修饰活呼吸疫苗，1种局部用药和1种口服杀寄生虫剂。另一个程序（Prog2）包括1种可注射的梭菌疫苗，1种改良的活呼吸道疫苗和1种可注射的杀寄生虫剂。与Prog2程序（47.8％）相比，Prog1中的小牛百分比较高（59.7％）。死亡率，病死率，第一次治疗成功或慢性风险的计划之间没有差异。在整个研究期间，Prog2犊牛（1.23公斤）的平均日增重大于Prog1犊牛（1.16公斤）。在研究的前28天中，每天平均给Prog1小牛服用更多的步骤。此外，在研究的最后14天中，Prog1小牛在某些日子花费了更多的时间。在最初的程序管理过程中，与Prog2犊牛（47.8％）相比，发声的Prog1犊牛（39.8％）更少。在这项研究中，与注射更多的牛犊相比，注射较少次数的牛犊对程序的厌恶程度较低，但发病率更高，性能更差。

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