
02/09/05, 04:09 PM
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Very Dairy
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Join Date: Dec 2002
Location: Dysfunction Junction
Posts: 14,603
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Johne's (pronounced YO-knees) is a wasting disease caused by a bacterial infection. There is no cure for it. A cow can carry (and spread) the disease for years without showing outward symptoms. It is transmitted via the fecal-oral route and also to calves via milk. The same bacteria that causes Johne's in cows has been found in the intestinal tract of people with Crohn's disease.
I lost a cow to Johne's, a heartbreaking experience. It can be detected by blood and/or fecal tests. There is also a newer ELISA test which can detect it in milk, which obviously is not applicable to your sitution since the cow isn't in milk.
You are right that the cows at the sales are probably there for a reason! I have bought a couple cull cows from the farm where I work, but I was familiar with their histories and even then was taking a gamble.
An exception might be a herd dispersal sale, but even that is really not the place for a novice. Or even for an experienced person looking for a family cow, as it's hard to gauge how easy a cow will be to milk by hand, or how docile it is, by how it acts in the ring.
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