PDF(Pubmed)
Abstract：
Retrospective evaluation of udder recovery following treatment of the inflamed quarter with acoustic pulse technology (APT) of cows with subclinical mastitis was done on 4 Israeli commercial dairy farms. Here, we evaluated the APT treatment as a tool to manage subclinical mastitis and its economic consequences in commercial farms. Recovery of the infected glands following APT treatment was compared to the customary no-treatment (NT) for cows with subclinical mastitis. Over 2 years, 467 cows with subclinical mastitis were identified. Subclinical mastitis was defined by elevated somatic cell count (SCC; >1 × 106 cells/mL) in the monthly test-day milk sample; 222 cows were treated with APT and 245 cows were not treated and served as control. Differences between treatment groups in culling, milk quality, milk yield and bacterial elimination were analyzed. After treatment, cure from bacteria was calculated only for cows with pre-isolated bacteria. The percentage of sampled cows determined as cured (no bacterial finding) in the NT group was 32.7% (35/107) (30.9% Gram negative; 32.4% Gram positive) and in the APT-treated group, 83.9% (42/55) (89.4% Gram negative; 80.6% Gram positive). Culling rate due to mastitis was significantly lower (>90%) in the APT-treated vs. NT group. Recovery was 66.0% in the APT group compared to 11.5% in the NT group at 90 d post-treatment. Average milk volume per cow in the APT-treated group was 16.1% higher compared to NT cows. Based on the study, savings incurred by using APT to treat only subclinical cows per 100-cow herd can total $15,106/y, or $309 per treated subclinically infected cow.
摘要：
在4个以色列商业奶牛场上，对患有亚临床乳腺炎的奶牛用声脉冲技术（APT）治疗发炎的四分之一后的乳房恢复进行了回顾性评估。这里,我们评估了APT治疗作为治疗亚临床乳腺炎的工具及其在商业农场中的经济后果.将APT治疗后感染腺体的恢复与患有亚临床乳腺炎的奶牛的常规不治疗（NT）进行比较。超过2年,鉴定了467头患有亚临床乳腺炎的母牛。通过每月测试日奶样品中体细胞计数升高(SCC;>1×106个细胞/mL)来定义亚临床乳腺炎;用APT处理222头牛,不处理245头牛,并作为对照。治疗组之间在剔除方面的差异，牛奶质量,分析了产奶量和细菌消除情况。治疗后,仅对具有预分离细菌的奶牛计算细菌的治愈。NT组中确定为治愈（无细菌发现）的采样母牛百分比为32.7％（35/107）（30.9％革兰氏阴性;32.4％革兰氏阳性），在APT治疗组中，83.9%(42/55)(89.4%革兰氏阴性;80.6%革兰氏阳性)。在APT治疗的患者中，由于乳腺炎引起的剔除率明显较低（>90％）。NT组。治疗后90d，APT组为66.0％，NT组为11.5％。与NT母牛相比,APT处理组中每只母牛的平均奶体积高16.1%。根据这项研究，通过使用APT仅治疗每100头牛群的亚临床奶牛而产生的节省总计15,106美元/年，或每头接受治疗的亚临床感染母牛309美元。
