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Offline DL

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Combined curly calf info
« on: September 06, 2008, 09:27:29 AM »
Attached is a pdf describing the latest genetic issue to hit the Angus breed - curly calf AKA Bovine Hereditary Arthrogryposis Multiplex Congenita

It has been seen across the US, as well as in Australia and I believe Canada - will post additional pictures and info when I get back - again have a Quadrant 4 day! ;)
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Offline DLD

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Re: Curly Calf Syndrome
« Reply #1 on: September 06, 2008, 10:30:02 AM »
Looks like there might be a reason some Angus bulls were accused of being TH carriers...
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Offline Jeff_Schroeder

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Re: Curly Calf Syndrome
« Reply #2 on: September 06, 2008, 11:25:22 AM »
That's a very sad picture but the I can't get past the irony of the fact that the calf is already tagged.

Offline DL

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Re: Curly Calf Syndrome
« Reply #3 on: September 06, 2008, 01:22:22 PM »
Yeah DLD I think you may be right. Also JS it is ironic - I certainly don't tag dead calves but maybe that was the only way to identify the dam amongst a bunch of deformed calves :(

Few more pictures - it is clear that the one calf required a fetotomy to be delivered

more info from Dr Dehnholm of Oz

Most cases are stillborn, but occasional BHAMC affected calves are born alive. All have arthrogryposis or fixation of the leg joints, usually with fixed flexion of the forelimbs and fixed extension of the hindlimbs as shown in Dr Steffen's photos. Most cases have severe kyphoscoliosis (twisting of the thoracic and lumbar spine), torticollis (twisting of the neck) and a marked lack of muscle development, leading to a bodyweight about half normal (about 15 to 20 kg). Most are full-term calves with erupted teeth, open eyelids etc. Some cases also have palatoschisis (cleft palate), as reported in Charolais calves in Canada with heritable congenital arthrogryposis. He has tracked this recessive defect in pedigrees back as far as a particular bull born in the southern USA in 1979. There are at least two lines of descent from this bull that carry the defective allele, but one of these lines is not a common line. The other line however is very common. The main suspect carrier in Australia has 10,000 registered progeny. His sire is also a suspect carrier and has several thousand progeny and several US bred sons in s current and recent semen catalogues. I believe there will be thousands of carriers in Australia and more in the USA.So you might ask why is it that this syndrome has not been reported before. The reason is that these arthrogrypotic calves look like calves deformed as a result of intrauterine infection with one of the teratogenic Bunyamviruses such as Akabane virus (Australia) or Cache Valley virus (USA) which cause arthrogryposis and hydranencephaly. Only a careful post-mortem examinination will detect the difference. We have had numerous cases of suspect Akabane disease reported here over the last few years that were negative for Akabane antibodies or virus. This syndrome will likely be more important than Fawn Calf Syndrome, not only because it is lethal, but also because the affected bloodlines are more prevalent. Most Angus breeders in Australia are likely to e affected by this disease and most Angus breeders in North America will probably also be affected.

Finally, this syndrome of arthrogryposis, kyphoscoliosis and palatoschisis has also been reported in Hereford cattle (by Leipold from Kansas University in 1974). It probably occurs in many Bos taurus breeds and has been reported in Angus, Charolais and Herefords since the 1970's.
« Last Edit: September 06, 2008, 01:31:53 PM by DL »
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Offline cbcfarms

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Re: Curly Calf Syndrome
« Reply #4 on: September 06, 2008, 09:30:01 PM »
is there a privacy statement as to which bulls were the possible carriers mentioned? just wanted to know what the chances of being affected were.
It is better to keep one's mouth shut and to appear stupid, than to open it and remove all doubt.

Offline aj

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Re: Curly Calf Syndrome
« Reply #5 on: September 06, 2008, 10:49:34 PM »
So is it a little different than th?Or completely different or similar? Iff it wasn't for the popularity of Doublestuff...no one would know about th in the shorthorns. :)
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Offline DL

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Re: Curly Calf Syndrome
« Reply #6 on: September 07, 2008, 06:59:38 PM »
cbcfarms - I do not know who the carriers or purported carriers are - I am not terribly facile with the Angus pedigrees and the AAA appears to believe that any mention by anyone could result in someone suing someone (and blah blah blah) - which I find interesting since neither the Holstein nor RA associations take that position

aj - these are 2 completely different defects - although from the looks of the curly calf (and its twisted legs) you could see how it could be confused with TH - there is no abdominal hernia nor meningocele with the curly calf like there is in TH and there is apparently other abnormalities including in the brain with the curly calf.

It sure will be interesting...
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Offline cbcfarms

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Re: Curly Calf Syndrome
« Reply #7 on: September 07, 2008, 10:47:14 PM »
thanks for the explanation. i figured there would always be the threat of legal battles due to lost sales in semen and so forth. just have to wait it out and see when the smoke blows over.
It is better to keep one's mouth shut and to appear stupid, than to open it and remove all doubt.

Offline red

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Re: Curly Calf Syndrome
« Reply #8 on: September 08, 2008, 09:27:37 AM »
I agree w/ DLD. This probably explains why to the untrained eye why some Angus were accused of having TH.
Very interesting DL. It will be interesting to see how it unfolds.

Red
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Offline DL

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Re: Curly Calf Syndrome
« Reply #9 on: September 18, 2008, 09:33:42 AM »
The American Angus Association has posted a great deal of information on their web site about Curly Calf Syndrome, including potentially involved blood lines.

http://www.angus.org/aaa_notice.pdf
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Offline SD

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Re: Curly Calf Syndrome
« Reply #10 on: September 18, 2008, 09:54:06 AM »
DL - I figure a test should be coming very soon. It will be interesting which sons are positive. Or which ancestors.

I do give the AAA some points for how they have handled the situation. But there is a long road to travel.
Tact and Political Correctness were developed by those who lack the Testicular Fortitude to say what they really mean.

Offline DL

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Re: Curly Calf Syndrome
« Reply #11 on: September 18, 2008, 10:06:29 AM »
SD - I give the AAA points too - on Sept 5th they posted on their web site informatio about the defect and how to submit samples.  Per Dr B this resulted in a large number of samples. Last night they posted additional information -  in less than 2 weeks they have raised the bar on how an association should deal with lethal genetic defects - good for them, good for the breeders who submitted samples and good for Dr B & Barrel Racer too!
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Offline SD

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Re: Curly Calf Syndrome
« Reply #12 on: September 18, 2008, 10:24:37 AM »
After checking I have 3 Angus (black) heifers with 1680 in the pedigree. One of which has him on both sides. So the test will be done as soon as it is available. If they are positive I will calve them out with the calves getting tested with all positive ones going to slaughter and the cows going that way after their calving days are over.
Tact and Political Correctness were developed by those who lack the Testicular Fortitude to say what they really mean.

Offline JbarL

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Re: Curly Calf Syndrome
« Reply #13 on: September 18, 2008, 10:44:22 AM »
dl...thanks for the info.( again)......glad to see the association get on it with some timeleness as well....thanks to all who contributed info and dr b and barrel racer, as well......jbarl

Offline Show Heifer

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Re: Curly Calf Syndrome
« Reply #14 on: September 18, 2008, 08:57:54 PM »
I must admit, I was really hard on the AAA for the "covering up" this problem, but by golly they have stepped up to the plate and hit a triple (takes a lot to make a home run - look at the Red Angus Assoc for example). I commend the angus assoc and Gardiner Angus for giving them permission to print the bulls name and for supplying samples.
I am lucky, I didn't jump on the carcass band wagon, and have no 1680 bloodlines..... yeah for me...but 1680 is a huge bull in the breed and I am sure this will effect the breed immensely.
Now lets see how they handle the commercial angus folks.....
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