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New info on Chronic Wasting Disease
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<blockquote data-quote="ImBillT" data-source="post: 3093666" data-attributes="member: 117715"><p>CWD specifically absolutely is "new". It is almost certainly the result of scrapie crossing from sheep to mule deer in a poorly handled animal pen where scrapie had been studied extensively. </p><p></p><p>Prion diseases in general have been here since essentially from the beginning. They sporadically appear in roughly 1/1,000,000 individuals in mammals know to have them, and I believe they are assumed to exist in just about all mammals. Generally they are not transmissible from animal to animal except through rather unusual circumstances such as, blood transfusions, contaminated medical instruments, and cannibalism. Scrapie and CWD are the only two I'm aware of that can be transmitted via casual contact. In those research pens they could take a new stainless steel rubbing post, put it in a pen with infected sheep, then clean it and leave it in the sun for an extended period, move it to a pen with healthy sheep, and all the healthy sheep would come down with scrapie. That transmissibility is what has caused some deer populations to have over 20% prevalence rates instead of the 1/100,000,000 that other species exhibit. Deer probably had a prion disease with a 1/100,000,000 prevalence since deer came into being.</p><p></p><p>CWD itself is new. It popped up in the 1960's IIRC. Its prevalence has been increasing slowly, but as an exponential rate. It has probably only been the last 10-20 years that really substantial numbers of people have been eating infected deer. I'm gonna get my deer and elk tested before I feed them to my family. </p><p></p><p>I wavered on where to apply in UT for general deer this year, but went ahead and applied for a unit with a very high prevalence rate. I'll definitely have it tested. I may have it tested twice. But I'm still going hunting, and as long as it's negative, I'm still gonna eat it.</p></blockquote><p></p>
[QUOTE="ImBillT, post: 3093666, member: 117715"] CWD specifically absolutely is “new”. It is almost certainly the result of scrapie crossing from sheep to mule deer in a poorly handled animal pen where scrapie had been studied extensively. Prion diseases in general have been here since essentially from the beginning. They sporadically appear in roughly 1/1,000,000 individuals in mammals know to have them, and I believe they are assumed to exist in just about all mammals. Generally they are not transmissible from animal to animal except through rather unusual circumstances such as, blood transfusions, contaminated medical instruments, and cannibalism. Scrapie and CWD are the only two I’m aware of that can be transmitted via casual contact. In those research pens they could take a new stainless steel rubbing post, put it in a pen with infected sheep, then clean it and leave it in the sun for an extended period, move it to a pen with healthy sheep, and all the healthy sheep would come down with scrapie. That transmissibility is what has caused some deer populations to have over 20% prevalence rates instead of the 1/100,000,000 that other species exhibit. Deer probably had a prion disease with a 1/100,000,000 prevalence since deer came into being. CWD itself is new. It popped up in the 1960’s IIRC. Its prevalence has been increasing slowly, but as an exponential rate. It has probably only been the last 10-20 years that really substantial numbers of people have been eating infected deer. I’m gonna get my deer and elk tested before I feed them to my family. I wavered on where to apply in UT for general deer this year, but went ahead and applied for a unit with a very high prevalence rate. I’ll definitely have it tested. I may have it tested twice. But I’m still going hunting, and as long as it’s negative, I’m still gonna eat it. [/QUOTE]
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