. Diseases of the horse's foot. Horses; Hoofs -- Diseases; Horses -- Diseases. 430 DISEASES OF THE HORSE'S FOOT then progressed until destruction of the secreting layer of the bursal membrane has been seriously interfered with, and in this case we find a distinct deficiency in the quantity of synovia in the bursa. In advanced cases it is even found that the bursa is absolutely dry. 2. Changes in the Cartilage.—Directly that portion of the bursal membrane covering the cartilage is the subject of inflammatory change, the cartilage itself, by reason of its low vitality, soon suffers. Under a proc
. Diseases of the horse's foot. Horses; Hoofs -- Diseases; Horses -- Diseases. 430 DISEASES OF THE HORSE'S FOOT then progressed until destruction of the secreting layer of the bursal membrane has been seriously interfered with, and in this case we find a distinct deficiency in the quantity of synovia in the bursa. In advanced cases it is even found that the bursa is absolutely dry. 2. Changes in the Cartilage.—Directly that portion of the bursal membrane covering the cartilage is the subject of inflammatory change, the cartilage itself, by reason of its low vitality, soon suffers. Under a process, which we may term ' dry ulcerative,' the cartilage covering the ridge on the lower surface of the bone commences to become eroded, and in appearance has been likened, both by English and Continental writers, to a piece of wood that has been worm-eaten (see Fig. 161).. Fig. 161.—Navicular Bone (Postero-inferior Surface) showing the 'Worm-eaten' appearance caused by Erosion of the Hyaline Cartilage, and commencing Rarefactive Arthritis. ' At this stage, or much earlier '—we are quoting Colonel Smith, —* may be found calcareous deposits in the fibro-cartilage and the bone. They are scattered like fine sand here and there, generally across the inferior half of the face of the bone; sometimes numerous, fre- quently scanty, occasionally entirely absent. The amount of calcareous degeneration depends upon the lesions pres- ent. If much destruction of bone exists, there will be but few calcareous deposits; whilst if there are many calcareous deposits, there may be but slight ulceration of bone tissue, and perhaps none at all. In fact, I have held the opinion, and see no reason to modify it, that calcareous deposits are safeguards against caries.'* * Journal of Comparative Pathology and Therapeutics, vol. vi., p. 195-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and app
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