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Black leg....a doozer of a question
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<blockquote data-quote="gberry" data-source="post: 695991" data-attributes="member: 3325"><p>Somebody with AIDS do something mean to you Knersie?</p><p></p><p>I think blackleg resistance could be bred into cattle, but it will never happen. The reason is that very large portions of the population would have to be exposed to get a very few survivors. Those survivors would likely have some genetic advantage in dealing with clostridium and could pass that on. After a few generations that were exposed and killed in large numbers, the remaining few would be more resistant.</p><p></p><p>There are examples in humans of genetic resistance to infectious diseases. Perhaps the best examples would be sickle cell trait and thalassemia which confer some resistance to malaria to those affected. Of course, both of these come with some unwanted baggage (sickle cell disease and thalassemia major) which make them much less desirable in areas where malaria is not prevalent.</p><p></p><p>In other words, I think it may be possible to breed for resistance to a certain disease, but you are likely to end up with some unwanted undesirable effects that would make you wish you had just vaccinated.</p></blockquote><p></p>
[QUOTE="gberry, post: 695991, member: 3325"] Somebody with AIDS do something mean to you Knersie? I think blackleg resistance could be bred into cattle, but it will never happen. The reason is that very large portions of the population would have to be exposed to get a very few survivors. Those survivors would likely have some genetic advantage in dealing with clostridium and could pass that on. After a few generations that were exposed and killed in large numbers, the remaining few would be more resistant. There are examples in humans of genetic resistance to infectious diseases. Perhaps the best examples would be sickle cell trait and thalassemia which confer some resistance to malaria to those affected. Of course, both of these come with some unwanted baggage (sickle cell disease and thalassemia major) which make them much less desirable in areas where malaria is not prevalent. In other words, I think it may be possible to breed for resistance to a certain disease, but you are likely to end up with some unwanted undesirable effects that would make you wish you had just vaccinated. [/QUOTE]
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Black leg....a doozer of a question
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