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Dead Cow Walking, I need Help!
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<blockquote data-quote="regolith" data-source="post: 666616" data-attributes="member: 9267"><p>I honestly don't know. I've asked my vets about the means of spread of Johne's because what research I'd done turned up nothing conclusive, and all they can tell me is that the calf is infected at some time less than six months old. I did find a website once with guidelines for clearing/keeping your herd clean of Johne's that were so close to impossible you'd think every-one would be vaccinating. Maternal transmission is presumed, colostrum possible, faecal/mouth transmission to susceptible calves is likely.</p><p>I doubt the shed virus is infective for years into the future because most viruses just don't work that way - light or dessication destroys them.</p><p>What I do know is that the vet told me after those two that I might see one or two a year from that group of cows. There's been another since.</p></blockquote><p></p>
[QUOTE="regolith, post: 666616, member: 9267"] I honestly don't know. I've asked my vets about the means of spread of Johne's because what research I'd done turned up nothing conclusive, and all they can tell me is that the calf is infected at some time less than six months old. I did find a website once with guidelines for clearing/keeping your herd clean of Johne's that were so close to impossible you'd think every-one would be vaccinating. Maternal transmission is presumed, colostrum possible, faecal/mouth transmission to susceptible calves is likely. I doubt the shed virus is infective for years into the future because most viruses just don't work that way - light or dessication destroys them. What I do know is that the vet told me after those two that I might see one or two a year from that group of cows. There's been another since. [/QUOTE]
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