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A case-control study of herd- and cow-level risk factors associated with an outbreak of Mycoplasma mastitis in Nemuro, Japan.
Preventive Veterinary Medicine ( IF 2.6 ) Pub Date : 2020-03-02 , DOI: 10.1016/j.prevetmed.2020.104946
Yuri Fujimoto 1 , Hirotaka Ito 1 , Hidetoshi Higuchi 2 , Hiroshi Ohno 3 , Kohei Makita 1
Affiliation  

The objective of this case-control study was to determine the herd- and cow-level risk factors associated with an outbreak of Mycoplasma bovine mastitis in the winter of 2014-2015 in Nemuro, Hokkaido, Japan. Two questionnaire surveys were sent to all 40 Mycoplasma-infected farms in the area and 73 non-infected farms for the farm-level analysis. Infected cows were matched to twice the number of non-infected cows in the same herds by parity and days after calving. Movement records, dairy herd test records, and clinical records of infected cows and matched non-infected cows were collected for the cow-level analysis. Risk factors for Mycoplasma infection were explored by multivariable analyses at both levels. In the herd-level analysis, tie stall housing for milking cows (odds ratio [OR] = 0.20, 95 % confidence interval [CI]: 0.07-0.60, p =  0.004), consciously wiping of teat openings before milking (OR = 0.15, 95 % CI: 0.02-0.76, p =  0.030), and use of paper towels to wipe teats (OR = 0.31, 95 % CI: 0.09-0.92, p =  0.045) were identified as preventive factors, whereas introduction of cattle (OR = 3.43, 95 % CI: 1.14-10.86, p =  0.030) was identified as a risk factor. In the cow-level analysis, a history of presence in livestock markets (OR = 10.80, 95 % CI: 1.12-104.38, p =  0.040), higher milk yield 2 months prior to Mycoplasma infection (OR = 1.09, 95 % CI: 1.02-1.18, p =  0.014), and previous diagnosis of acute mastitis without isolation of the causal pathogen (OR = 3.14, 95 % CI: 0.86-11.41, p =  0.082) were identified as risk factors. These results highlight the importance of proper milking hygiene control and quarantine of introduced cattle to prevent Mycoplasma infection.

中文翻译:

在日本根室市爆发与支原体乳腺炎有关的牛群和奶牛高危因素的病例对照研究。

这项病例对照研究的目的是确定2014-2015年冬季在日本北海道根室市爆发的与支原体牛乳腺炎有关的牛群和母牛水平的危险因素。向该地区的所有40个受支原体感染的农场和73个未感染的农场发送了两次问卷调查,以进行农场级别的分析。通过产犊和产犊后的天数,被感染的牛与相同群中未感染的牛的数量相匹配。收集感染奶牛和匹配的未感染奶牛的运动记录,奶牛群测试记录和临床记录,以进行奶牛水平分析。通过两个级别的多变量分析探索了支原体感染的危险因素。在畜群水平分析中,为奶牛使用平摊档位(赔率[OR] = 0.20,95%置信区间[CI]:0.07-0.60,p = 0.004),挤奶前有意识地擦拭奶嘴开口(OR = 0.15,95%CI:0.02-0.76,p = 0.030),并使用纸巾擦拭奶嘴(OR = 0.31,95%CI:0.09-0.92,p = 0.045)被确定为预防因素,而引入牛(OR = 3.43,95%CI:1.14-10.86,p = 0.030)被确定为危险因素。在奶牛水平分析中,存在牲畜市场的历史(OR = 10.80,95%CI:1.12-104.38,p = 0.040),支原体感染前两个月的产奶量较高(OR = 1.09,95%CI:将其确定为1.02-1.18,p = 0.014),并且事先诊断为急性乳腺炎而未分离出病原体(OR = 3.14,95%CI:0.86-11.41,p = 0.082)是危险因素。这些结果强调了适当挤奶卫生控制和引入牛隔离对预防支原体感染的重要性。
更新日期:2020-03-20
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