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CURLY CALF SYNDROME in AAA
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<blockquote data-quote="alexfarms" data-source="post: 593178" data-attributes="member: 8677"><p>hydrocephalis...would be "water head"? The calves I got were not water heads, that I am certain of. There is that genetic abnormality and it has been identified years ago. The calves I sent in were small, had multiple malformations. It was explained to me at the time that an infection by a virus at "organogenesis" could disrupt development of the calves and cause mutliple malformations. No sign of a virus could be found and Dr Steffen said usually the virus can only be detected for a short time after the infection. His only conclusion was "placental insufficiency", he said because that was the only thing that could definately be said. I had read that the CSU studies of several Hereford lines, years ago, had concluded that as inbreeding coefficient increases the incidence of placental insufficiency also increases, so I suspected that it may be a weakness in an inbred line brought on by inbreeding depression. If this CCS is similar to the affects of many "environmental influences" , then the DNA test is going to be a very powerfull tool to determine what is going on in these situations. I suspect this is a genetic abnormality that has been around a long time and it is just now being determined to be genetic, that is why it is so widespread and we are going to see alot of carriers identified. I have kept a small amount of semen on a bull that produced one of the ugly little things for me and when the test comes out I will get it checked. It really disgusted me at the time because I spoke to the herd manager where the linebred genetics originated from and he refused to even consider that there could be a genetic abnormality involved and I know he was getting some of the little things too. It may all have been environmental, I couldn't figure it out and only Dr Steffen was interested in helping me pursue it. It sure made me reluctant to get into that line too deep. Back in the 60's the Herefords were the big kid on the block and they took a lot of heat for the dwarfism outbreak, but other breeds had it too.</p></blockquote><p></p>
[QUOTE="alexfarms, post: 593178, member: 8677"] hydrocephalis...would be "water head"? The calves I got were not water heads, that I am certain of. There is that genetic abnormality and it has been identified years ago. The calves I sent in were small, had multiple malformations. It was explained to me at the time that an infection by a virus at "organogenesis" could disrupt development of the calves and cause mutliple malformations. No sign of a virus could be found and Dr Steffen said usually the virus can only be detected for a short time after the infection. His only conclusion was "placental insufficiency", he said because that was the only thing that could definately be said. I had read that the CSU studies of several Hereford lines, years ago, had concluded that as inbreeding coefficient increases the incidence of placental insufficiency also increases, so I suspected that it may be a weakness in an inbred line brought on by inbreeding depression. If this CCS is similar to the affects of many "environmental influences" , then the DNA test is going to be a very powerfull tool to determine what is going on in these situations. I suspect this is a genetic abnormality that has been around a long time and it is just now being determined to be genetic, that is why it is so widespread and we are going to see alot of carriers identified. I have kept a small amount of semen on a bull that produced one of the ugly little things for me and when the test comes out I will get it checked. It really disgusted me at the time because I spoke to the herd manager where the linebred genetics originated from and he refused to even consider that there could be a genetic abnormality involved and I know he was getting some of the little things too. It may all have been environmental, I couldn't figure it out and only Dr Steffen was interested in helping me pursue it. It sure made me reluctant to get into that line too deep. Back in the 60's the Herefords were the big kid on the block and they took a lot of heat for the dwarfism outbreak, but other breeds had it too. [/QUOTE]
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