Diseases of cattle, sheep, goats Diseases of cattle, sheep, goats and swine diseasesofcattl00mous Year: 1905 OSSEOUS CACHEXIA. 17 a spongy appearance. They diminish in density. These changes correspond to the stages of eccentric rarefying ostitis and osteoporosis of German authors. The flat bones often show well-marked periostitis, but the great thickening sometimes seen in certain of the bones of the head appears to be the result of a special osteo-periostitis. It is quite certain that the disease is due to something more than a mere want of mineral constituents in the bone, and poverty in
Diseases of cattle, sheep, goats Diseases of cattle, sheep, goats and swine diseasesofcattl00mous Year: 1905 OSSEOUS CACHEXIA. 17 a spongy appearance. They diminish in density. These changes correspond to the stages of eccentric rarefying ostitis and osteoporosis of German authors. The flat bones often show well-marked periostitis, but the great thickening sometimes seen in certain of the bones of the head appears to be the result of a special osteo-periostitis. It is quite certain that the disease is due to something more than a mere want of mineral constituents in the bone, and poverty in this respect certainly does not explain the hypertrophic changes. The nutrition of the bones as a whole is disturbed, resulting in alterations both in the ossein and Fig. 8.—Transverse section through the middle region of the face in a pig suffering; from osseous cachexia. in the mineral salts, the whole process being accompanied by symptoms of osteo-periostitis. The fractures which occur so frequently during the osteoclastic phase have well-marked peculiarities. The extravasation of blood is trifling, and no callus forms, even when the ends of the bones are immobilised by external aid ; if the ends are left free, they soon become worn and polished by rubbing against one another. r [ In the neighbourhood of the articulations and ligamentous insertions the periosteum soon undergoes change, and it is not uncommon to find sub-periosteal and intra-osseous extravasations of blood, Germain has also noted in horses the disappearance of the interver- tebral and articular cartilages, and the frequent occurrence of anchylosis, true or false. 0
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