Department of Animal Science; University of Tennessee, Knoxville, TENN, USA.
Department of Forestry, Wildlife, and Fisheries, University of Tennessee, Knoxville, TENN, USA.
J Dairy Res. 2020 Feb;87(1):60-63. doi: 10.1017/S0022029919000943. Epub 2020 Feb 5.
This research communication addresses the hypothesis that Southeast dairy producers' self-reported bulk tank somatic cell count (BTSCC) was associated with producers' response to three statements (1) 'a troublesome thing about mastitis is the worries it causes me,' (2) 'a troublesome thing about mastitis is that cows suffer,' and (3) 'my broad goals include taking good care of my cows and heifers.' Surveys were mailed to producers in Georgia, Kentucky, Mississippi, North Carolina, South Carolina, Tennessee, and Virginia (29% response rate, N = 596; final analysis N = 574), as part of a larger survey to assess Southeastern dairy producers' opinions related to BTSCC. Surveys contained 34 binomial (n = 9), Likert scale (n = 7), and descriptive (n = 18) statements targeted at producer self-assessment of herd records, management practices, and BTSCC. Statements 1 and 2 were assessed on a 5-point Likert scale from 'strongly disagree' to 'strongly agree.' Statement 3 was assessed on a 5-point Likert scale from 'very unimportant' to 'very important.' Reported mean BTSCC for all participants was 254 500 cells/ml. Separate univariable logistic regressions using generalized linear mixed models (SAS 9.4, Cary, NC, USA) with a random effect of farm, were performed to determine if BTSCC was associated with probability for a producer's response to statements. If BTSCC was significant, forward manual addition was performed until no additional variables were significant (P ≤ 0.05), but included BTSCC, regardless of significance. Bulk tank somatic cell count was associated with 'a troublesome thing about mastitis is the worries it causes me,' but not with Statements 2 or 3. This demonstrates that >75% of Southeastern dairy producers are concerned with animal care and cow suffering, regardless of BTSCC. Understanding Southeast producers' emphasis on cow care is necessary to create targeted management tools for herds with elevated BTSCC.
本研究通讯探讨了一个假设,即东南奶农自我报告的奶罐体细胞计数(BTSCC)与奶农对以下三个陈述的反应有关:(1)“乳腺炎的一个麻烦事是它给我带来的担忧”;(2)“乳腺炎的一个麻烦事是奶牛会受苦”;(3)“我的主要目标包括照顾好我的奶牛和小母牛”。该研究对佐治亚州、肯塔基州、密西西比州、北卡罗来纳州、南卡罗来纳州、田纳西州和弗吉尼亚州的奶农进行了调查(29%的回复率,N=596;最终分析 N=574),作为一项评估东南奶农对 BTSCC 相关看法的大型调查的一部分。调查包含 34 个二项式(n=9)、李克特量表(n=7)和描述性(n=18)陈述,旨在评估奶农对牛群记录、管理实践和 BTSCC 的自我评估。陈述 1 和 2 采用 5 点李克特量表进行评估,从“强烈不同意”到“强烈同意”。陈述 3 采用 5 点李克特量表进行评估,从“非常不重要”到“非常重要”。所有参与者的报告平均 BTSCC 为 254500 个细胞/ml。使用带有农场随机效应的广义线性混合模型(SAS 9.4,美国北卡罗来纳州卡里)进行独立单变量逻辑回归,以确定 BTSCC 是否与奶农对陈述的反应概率有关。如果 BTSCC 有意义,则进行向前手动添加,直到没有其他变量具有统计学意义(P≤0.05),但无论是否有统计学意义,都包含 BTSCC。BTSCC 与“乳腺炎的一个麻烦事是它给我带来的担忧”有关,但与陈述 2 或 3 无关。这表明,超过 75%的东南奶农关心动物福利和奶牛的痛苦,而不管 BTSCC 如何。了解东南生产者对奶牛护理的重视是为高 BTSCC 牛群创建有针对性的管理工具的必要条件。