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首页> 外文期刊>Tropical Animal Health and Production >Milk yield and associated economic losses in quarters with subclinical mastitis due to Staphylococcus aureus in Ethiopian crossbred dairy cows
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Milk yield and associated economic losses in quarters with subclinical mastitis due to Staphylococcus aureus in Ethiopian crossbred dairy cows

机译：埃塞俄比亚杂交奶牛金黄色葡萄球菌引起的亚临床乳腺炎季度的牛奶产量和相关的经济损失

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摘要

The objective of the study was to estimate the prevalence and losses associated with subclinical mastitis (SCM) caused by Staphylococcus aureus in Ethiopian crossbred dairy cows. A split-udder trial was carried out to determine milk yield losses in udder quarter with S. aureus-caused SCM. Each quarter of the study cows was examined using the California Mastitis Test (CMT) and quarter milk production was measured over a period of 8 days. Milk yield losses for CMT positive quarters were estimated by comparing production of quarters with CMT score 0. Mean milk yield for uninfected healthy quarters was 1.66 kg per milking (95% CI, 1.66–1.55 kg per milking), and the rate of milk reduction for quarters with CMT scores of 1+, 2+, and 3+ was 25%, 33%, and 48%, respectively. Economic losses at different farm-size levels were calculated by multiplying the prevalence of CMT scores with milk yield losses associated with respective CMT scores. In Debre Ziet dairy herds, a quarter with SCM due to S. aureus lost an average of 34.5% of its potential milk production while the total milk yield loss per cow was estimated at 6.8%. Losses were highest in large-scale (13%) farms and lowest (3.7%) in small-scale. Based on the prevalence, the overall financial loss for each cow per lactation was 984.64 Eth Birr (US78.65) and losses in large farms (1,882.40 Eth Birr or US78.65) and losses in large farms (1,882.40 Eth Birr or US150.35) were over 3.5 times the loss in small-size farms. These figures possibly underestimate the potential benefits of mastitis control program as they do not include other direct and indirect costs.
机译：该研究的目的是估计埃塞俄比亚杂交奶牛中由金黄色葡萄球菌引起的亚临床乳腺炎（SCM）的患病率和损失。用金黄色葡萄球菌引起的SCM进行了乳房分裂试验，以确定乳房1/4处的牛奶产量损失。使用加利福尼亚乳腺炎测试（CMT）对研究的每头母牛进行了检查，并在8天内测量了每季度的产奶量。通过比较CMT阳性季度的产奶量和CMT得分为0的产区损失，估算出未感染健康区的平均产奶量为每挤奶1.66公斤（95％CI，每挤奶1.66–1.55公斤），以及减奶率CMT得分分别为1 +，2 +和3+的季度分别为25％，33％和48％。通过将CMT得分的患病率乘以与相应CMT得分相关的牛奶产量损失，可以计算出不同农场规模水平的经济损失。在Debre Ziet奶牛群中，因金黄色葡萄球菌而导致SCM的地区平均损失了其潜在产奶量的34.5％，而每头母牛的总产奶量损失估计为6.8％。大型农场的损失最高（13％），而小型农场的损失最低（3.7％）。根据患病率，每头泌乳牛的总体财务损失为984.64 Eth Birr（US78.65），大型农场的损失为（1884.20 Eth Birr或US78.65），大型农场的损失为（1882.40 Eth Birr或US150.35）。 ）是小型农场损失的3.5​​倍以上。这些数字可能低估了乳腺炎控制计划的潜在收益，因为它们不包括其他直接和间接费用。

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