Department of Agriculture, School of Agriculture, Meiji University, Kanagawa, Japan.
Center for Animal Disease Control, University of Miyazaki, Miyazaki, Japan.
J Vet Med Sci. 2022 Sep 21;84(10):1328-1334. doi: 10.1292/jvms.22-0178. Epub 2022 Aug 3.
The present study assessed the economic loss due to treatment of bovine respiratory disease (BRD) in Japanese Black calves that were introduced to a backgrounding operation from the age of 3 to 4 months until the age of 10 months. The data collected from a backgrounding operation in Miyazaki, Japan included the records of 2,690 animals entering the farm from 2013 to 2018. The treatment duration was defined as the number of days from the beginning to end of treatment. The cost of treatment was defined as the total cost of treatment during the treatment duration. The average incidence of BRD was 54.6%, and the relative frequency of calves that had BRD once, twice, and three or more times until they left the farm was 64.4%, 26.8%, and 8.8%, respectively (total recorded diagnoses of BRD: 2,494). Among the 2,494 recorded diagnoses, the average and median duration of treatment of BRD was 5.9 days and 3.0 days, respectively. The average and median cost of treatment was 7,767 and 5,600 Japanese yen, respectively. A prolonged duration of treatment and high cost of treatment were associated with BRD relapse, steers, and early stage of production (P<0.05). At the studied farm, the total cost of treatment during the 6-year study period was 19,658,988 yen, and the annual cost was approximately 3 million yen. In summary, the present study showed that BRD had a large economic impact in this backgrounding operation.
本研究评估了从 3 至 4 月龄到 10 月龄引入育肥场的日本黑牛犊因治疗牛呼吸道疾病（BRD）而造成的经济损失。该研究的数据来自日本宫崎县的一个育肥场，包括 2013 年至 2018 年期间进入该农场的 2690 头动物的记录。治疗持续时间定义为从开始治疗到结束治疗的天数。治疗费用定义为治疗持续时间内的总治疗费用。BRD 的平均发病率为 54.6%，在离开农场之前，有 BRD 一次、两次和三次或更多次的牛的相对频率分别为 64.4%、26.8%和 8.8%（BRD 的总记录诊断：2494）。在 2494 次记录诊断中，BRD 的平均和中位数治疗持续时间分别为 5.9 天和 3.0 天。平均和中位数治疗费用分别为 7767 日元和 5600 日元。治疗持续时间延长和治疗费用高与 BRD 复发、公牛和生产早期有关（P<0.05）。在研究农场，6 年研究期间的总治疗费用为 19658988 日元，每年的治疗费用约为 300 万日元。综上所述，本研究表明 BRD 对该育肥场造成了重大的经济影响。
