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Lucky....A question about Johne's disease..
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<blockquote data-quote="Lucky_P" data-source="post: 1073872" data-attributes="member: 12607"><p>The Johne's organism can persist in the environment - particularly in manure pats and moist soil (like around water tanks/feed troughs, etc.) for over one year. </p><p></p><p>Stockers - not a problem; especially if they're steers - someone's going to eat them long before they develop clinical disease, even if they became infected. </p><p></p><p>Pairs - guess I'd feel better if a year or more had passed since the dairy cattle were in residence, but the older animals are, the less likely they are to become infected. Studies suggest that it takes a pretty significant level of repeated or constant exposure to infect a mature cow. </p><p>Calves are most susceptible, and beef calves born to JD-infected cows are 10X more likely to be infected than calves born to non-JD dams in the same herd. Beef calves' principal exposure, in most cases, is from the dam - at least 25% of calves born to Johne's-infected dams are infected prior to birth, and infected cows shed organisms in colostrum/milk as well as feces.</p></blockquote><p></p>
[QUOTE="Lucky_P, post: 1073872, member: 12607"] The Johne's organism can persist in the environment - particularly in manure pats and moist soil (like around water tanks/feed troughs, etc.) for over one year. Stockers - not a problem; especially if they're steers - someone's going to eat them long before they develop clinical disease, even if they became infected. Pairs - guess I'd feel better if a year or more had passed since the dairy cattle were in residence, but the older animals are, the less likely they are to become infected. Studies suggest that it takes a pretty significant level of repeated or constant exposure to infect a mature cow. Calves are most susceptible, and beef calves born to JD-infected cows are 10X more likely to be infected than calves born to non-JD dams in the same herd. Beef calves' principal exposure, in most cases, is from the dam - at least 25% of calves born to Johne's-infected dams are infected prior to birth, and infected cows shed organisms in colostrum/milk as well as feces. [/QUOTE]
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Lucky....A question about Johne's disease..
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