Falkenberg U, Krömker V, Konow M, Flor J, Sanftleben P, Losand B
Rindergesundheitsdienst Tierseuchenkasse, Mecklenburg-Western Pomerania, Neustrelitzer Straße 120c, 17033 Neubrandenburg, Germany.
University of Kopenhagen, Section for Production, Nutrition and Health, Grønnegårdsvej 2, DK-1870 Frederiksberg C, Denmark.
Vet Anim Sci. 2022 Mar 1;16:100243. doi: 10.1016/j.vas.2022.100243. eCollection 2022 Jun.
In a cross-sectional study, impact of management in dairy farms on calf mortality rates and prevalence of rotavirus and in feces of calves was investigated. Sixty-two commercial dairy herds in Mecklenburg-Western Pomerania, Germany, were stratified selected in 2019. We performed in-person interviews and fecal specimens in samples of all-female calves of age 7 up to 21 days. Management data were documented on farm level. A Multiscreen Ag-ELISA was performed to determine rotavirus and . Associations between two calf mortality rates, detection of and rotavirus, and predictors were examined with GLM models. In farms with routine vaccination against respiratory diseases, 31-days mortality rate was 4.2% +/-1.26 compared to 7.6% +/-0.97 ( = 0.040) on non-vaccinating farms. Six-months mortality was lower in farms that continued feeding milk to calves during periods of diarrhea compared to farms that did not (6.9% +/-0.8 vs. 12.4% +/-2.3). In case of a routine shifting of calves from the calving box into calf boxes less was detected compared to an individual moving of calves (33.3% +/-2.6 vs. 19.6% +/-5.3; = 0.024). Our model confirms a positive association between occurrence of aqueous feces and frequency of detection of (45.4% +/-23.6 vs. 21.4% +/-18.7; < 0.001). Frequency of detection of rotavirus was lower in farms that reported a defined amount of applicated colostrum per calf than in farms that presented a range of colostrum instead of a defined amount. This study indicates the potential for mitigation of risk factors for mortality in calves.
在一项横断面研究中，调查了奶牛场管理对犊牛死亡率以及犊牛粪便中轮状病毒和[未提及的某种物质，原文此处用“”表示]流行率的影响。2019年，从德国梅克伦堡-前波美拉尼亚州分层选取了62个商业奶牛群。我们对7至21日龄的所有雌性犊牛样本进行了现场访谈并采集了粪便标本。管理数据记录在农场层面。采用多筛Ag-ELISA法检测轮状病毒和[未提及的某种物质，原文此处用“”表示]。使用广义线性模型（GLM）研究了两种犊牛死亡率、[未提及的某种物质，原文此处用“”表示]和轮状病毒检测结果与预测因素之间的关联。在对呼吸道疾病进行常规疫苗接种的农场中，31日龄死亡率为4.2%±1.26，而未接种疫苗的农场为7.6%±0.97（P = 0.040）。与腹泻期间不给犊牛喂奶的农场相比，腹泻期间继续给犊牛喂奶的农场6个月死亡率更低（6.9%±0.8对12.4%±2.3）。与单独转移犊牛相比，犊牛从产犊箱常规转移到犊牛栏时检测到的[未提及的某种物质，原文此处用“”表示]更少（33.3%±2.6对19.6%±5.3；P = 0.024）。我们的模型证实了水样粪便的出现与[未提及的某种物质，原文此处用“”表示]检测频率之间存在正相关（45.4%±23.6对21.4%±18.7；P < 0.001）。报告每头犊牛初乳投喂量固定的农场中轮状病毒检测频率低于初乳投喂量不固定而是有一定范围的农场。本研究表明降低犊牛死亡风险因素具有潜力。
