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首页> 外文期刊>Advances in Dairy Technology >Johne's Disease: The Ontario Program -Experiences from 2005 to 2011
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Johne's Disease: The Ontario Program -Experiences from 2005 to 2011

机译:约翰病:安大略省计划-2005年至2011年的经验

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摘要

Johne's disease is a bacterial disease of cattle caused by Mycobacterium avium paratuberculosis (MAP). Young calves catch it by ingesting the MAP bacteria shortly after birth. Some can be born already infected. The course of MAP infection is slow, taking years to progress from the start of infection to the actual sickness, called Johne's disease (JD). Most infected cattle don't live long enough nor progress to the final disease state. Unfortunately, even though not visibly sick (they are subclinically infected), as MAP infected cows advance in age they are increasingly likely to shed MAP in their manure, milk and colostrum. These bacteria then can infect young stock and amplify the infection cycle in the next generation of replacements on the farm.
机译:约翰尼氏病是由鸟分枝杆菌结核分枝杆菌(MAP)引起的牛的细菌性疾病。幼小牛在出生后不久就通过摄入MAP细菌来捕获它。有些可以出生就已经被感染。 MAP感染的过程很慢,从感染开始到真正的疾病,即约翰德氏病(JD),需要数年的时间才能发展。大多数感染牛的寿命不足,也无法发展到最终的疾病状态。不幸的是,即使没有明显的病情(他们已被亚临床感染),随着被MAP感染的母牛年龄的增长,它们越来越有可能在粪便,牛奶和初乳中脱落MAP。这些细菌可以感染年轻种群,并在农场的下一代替代品中扩大感染周期。

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