捷克大型奶牛群约翰氏病的有效控制

IF 1.5 3区 农林科学 Q2 VETERINARY SCIENCES Onderstepoort Journal of Veterinary Research Pub Date : 2022-02-03 DOI:10.2478/jvetres-2022-0001
V. Fichtelová, A. Králová, V. Babak, K. Kovařčík
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引用次数: 1

摘要

摘要简介约翰氏病,由鸟分枝杆菌亚种感染引起。副结核(MAP),由于产奶量减少和过早扑杀,给奶牛群造成经济损失。在受感染的畜群中采用了检测剔除战略,并改变了小牛饲养管理,以预防新的感染,以控制MAP的流行。本研究评估了这些实践变化的有效性。材料与方法对19个大型奶牛群(平均470头奶牛)实施3-7年的MAP控制措施,采用血清酶联免疫吸附试验检测干枯期感染奶牛。计算每年elisa阳性动物(EPAY)的数量,并使用统计分析来检验EPAY总数在控制期间是否减少,并分析EPAY与控制计划持续时间的关系。结果EPAY随时间的推移呈下降趋势(P < 0.01,比值比0.756),14个畜群EPAY在试验期内呈显著下降趋势(P≤0.05)。结论在初始EPAY≥3.36%的畜群中,控制措施到位,有效降低了MAP感染。其余5个平均初始EPAY较低的畜群缺少下降趋势,这表明需要采取额外措施来减少这些畜群中受感染动物的数量。
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Effective Control of Johne’s Disease in Large Czech Dairy Herds
Abstract Introduction Johne’s disease, caused by infection with Mycobacterium avium subsp. paratuberculosis (MAP), causes economic losses in dairy herds due to reduced milk production and premature culling. A test-and-cull strategy coupled with changes in calf rearing management preventing new infections has been introduced into infected herds to control MAP prevalence. This study appraised the effectiveness of these practice changes. Material and Methods In 19 large dairy herds (of a median 470 milk-producing cows), implementing MAP control measures for 3–7 years, a serum ELISA was used to detect infected cows in their dry-off period. The number of ELISA-positive animals per year (EPAY) was calculated and statistical analysis was used to test whether the EPAY total decreased during the control period and to analyse the EPAY in relationship to the duration of the control programme. Results Statistical support was found for a decrease of EPAY over time (P < 0.01, odds ratio 0.756) and in 14 herds a significant fall in the percentages of EPAY during the test period (P ≤ 0.05) was noted. Conclusion Our results demonstrated the effectiveness of the control measures in place to reduce MAP infection in herds with initial EPAY ≥3.36%. The missing decreasing trend in the remaining five herds with low average initial EPAY suggested the need for additional measures to reduce the number of infected animals in these herds.
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来源期刊
CiteScore
4.30
自引率
0.00%
发文量
13
审稿时长
16 weeks
期刊介绍: The Onderstepoort Journal of Veterinary Research, is the official publication of the Onderstepoort Veterinary Institute. While it considers submissions from any geographic region, its focus is on Africa and the infectious and parasitic diseases and disease vectors that affect livestock and wildlife on the continent.
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