ACTA VET. BRNO, 60,1991: 237-251 CONGENITAL DISPROPORTIONAL CHONDRODYSPLASIA IN PIGS

Kaman J., J. Drabek, Z. Zert: Congenital Disproportional Chondrodysplasia in pigs. Acta vet. Bmo, 60, 1991: 237-251. In a commercial stock of pigs reared semi-intensively almost 100 animals out of a total of about 800 juvenile pigs exhibited variously intense motility disorders, some very serious, of unclear aetiology, mainly in the pelvic limbs. The clinical symptoms were reminiscent of Ca and P metabolic disorders, but increased satu-ration with these elements did not result in an improvement. With increasing weight the motility disorders of the animals increased to such an extent that they all had to be slaughtered before reaching the proper body mass. Clinical, X-ray and pathomorphological stUdy of 8 sick animals and two controls revealed the typical signs of disproportional. congenital chondrodysplasia; strikingly short limbs as a result of premature closure of growth cartilage, and thus a halt to the longitudinal growth of the long bones of endochondral type, their thicken-ing under the influence of normal continuation of perichondral ossification, extre-me dysplasia with characteristic deformation of the epiphyses and the joint sockets, especially in the regions of the joints, which were the actual cause of the. motility disorders. The proportions of trunk and head remained unchanged. As regards aetiology, we suppose this be a hereditary disorder of endochondral development of bones with autosomal recessive heredity. Chondrodysplasia, pathology, joints, bones, hereditary dwarfism, motility disorders, pig Hereditary dwarfism in various domestic animals has been described by various authors (Diimm