What is Arthrogryposis Multiplex (AM)? AM was recognized as a genetic condition on September 16, 2008. Calves are born dead or die shortly after birth. The spine and legs appear crooked or twisted and the joints of the legs are often fixed in position. Front legs are contracted and rear limbs may be contracted or extended. Calves are small and
Congenital and Inherited Anomalies of the Musculoskeletal ...
Arthrogryposis is ankylosis of the limbs, usually combined with a cleft palate and other growth deformities. It is seen in all breeds of cattle , particularly Charolais. At birth, affected calves exhibit joints fixed in abnormal positions and frequently have scoliosis and kyphosis.
Arthrogryposis Multiplex (AM), commonly known as Curly Calf syndrome, is a lethal genetic defect that was recently confirmed within the Angus breed. Other breeds with Angus in their pedigree may also be affected. An AM-affected calf is born dead, appears thin, and most notably, has a bent or twisted spine (Figure 1).
Arthrogryposis - an overview | ScienceDirect Topics
A hereditary congenital deformity in Hereford cattle characterized by arthrogryposis, kyphosis, torticollis, scoliosis, and cleft palate has been described. Teratogens indentified as causing arthrogryposis include plants and prenatal viral infections.
Appearance of a calf with Arthrogryposis Multiplex (“curly calf”). Photo used with permission from http://www.angus.org. It is important to note that some of these “curly calf” symptoms can be seen in genetically-normal calves that have been exposed to …
Arthrogryposis Multiplex (AM), commonly referred to as Curly Calf Syndrome is a lethal genetic defect with a simple recessive pattern of inheritance. Commercial cattlemen should be aware of AM, and the genetics that trace back to AM so that proper breeding decisions can be made, but there is no need for undue concern.
In the fall of 2008 a genetic defect in Angus cattle called Arthrogryposis Multiplex (AM) was identified. This trait has been widely disseminated in the breed because several popular sires were carriers.