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Epizootic Fibrinous Aphtha in Sheep
ABSTRACTS AND REPORT.
EPIZOOTIC FIBRINOUS APHTHA IN SHEEP. A PECULIAR inflammation of the mouth broke out in a flock of sheep numbering 760, which had for some time been grazed on a woodland pasture, and afterwards in open fields. It rapidly spread, so that in the course of three or four weeks about three-fourths of the total number of animals were attacked. Subsequently, with Ihe exception of some fifteen or twenty, the entire flock suffered. The symptoms were as follows : More or less marked dulness, which. however, only persisted for about three days, the appearance of diffuse redness on the mucous membrane of the mouth, and some oedematous swelling of the lips. On examination the inner surface of the bps, the masticating pad on the upper jaw, the gums, the mucous membrane of the fauces, the back of the tongue, and the hard palate were seen to be covered with round, firmly attached, greyish-white depGsits, surrounded by bright red areol:e. Interspersed between these were some of larger size. The back of the tongue exhibited similar lesions, but greyish-brown in colour. The margins of the lips were covered with small brownish crusts. The depOSits gradually became thicker, assuming on first sight the appearance of vesicles. In three to four days fresh lesions ceased to be formed, and the centres of those present showed signs of sOftening and breaking down, resulting in the formation of depressions and converting the bladder-like lesions into rings. Still later the deposit entirely disappeared, leaving a reddish superficial loss of substance, which, however, soon healed. The cases lasted for eight or ten days. No deaths were observed. Five healthy sheep introduced from a di,tant pasture contracted the complaint in from three to six days. The disease could not be conveyed to horses or oxen. (Vigadi, Allatorvosi Lapok, 19 0 5, p. 345, ex. Dettts. Tieriirztl. Wochcns., No. 27, 7th July 1906, p. 325.)
DISSECTING ANEURISM IN THE HORSE. DURING the past few months Petit has seen and described three cases of the above condition. In that mentioned below the subject was a cab horse which died suddenly and without visible cause. On post-mortem examination Ihe aortic trunk and the first portions of the anterior and posterior aort:e were surrounded by a thick layer of coagulated blood, which had first found its way into the periartenal c.onnective tissue beneath the visceral layer of the pericardIUm. This semi-organised layer, which was of rapid formation, had again become ruptured, and the pericardial cavity ultimately contained a voluminous clot, which, by pJ;essing on the heart, had caused death. On incising the aorta the rupture was seen to extend transversely for several centimetres across the vessel, opposite the space separating two sigmoid valves. This seems the commonest point of origin in ruplure of the aorta, though the phenomenon is not constant, Petit having recently descnbed a case of rupture at the bifurcation of the vessel.
EPIZOOTIC FIBRINOUS APHTHA IN SHEEP. A PECULIAR inflammation of the mouth broke out in a flock of sheep numbering 760, which had for some time been grazed on a woodland pasture, and afterwards in open fields. It rapidly spread, so that in the course of three or four weeks about three-fourths of the total number of animals were attacked. Subsequently, with Ihe exception of some fifteen or twenty, the entire flock suffered. The symptoms were as follows : More or less marked dulness, which. however, only persisted for about three days, the appearance of diffuse redness on the mucous membrane of the mouth, and some oedematous swelling of the lips. On examination the inner surface of the bps, the masticating pad on the upper jaw, the gums, the mucous membrane of the fauces, the back of the tongue, and the hard palate were seen to be covered with round, firmly attached, greyish-white depGsits, surrounded by bright red areol:e. Interspersed between these were some of larger size. The back of the tongue exhibited similar lesions, but greyish-brown in colour. The margins of the lips were covered with small brownish crusts. The depOSits gradually became thicker, assuming on first sight the appearance of vesicles. In three to four days fresh lesions ceased to be formed, and the centres of those present showed signs of sOftening and breaking down, resulting in the formation of depressions and converting the bladder-like lesions into rings. Still later the deposit entirely disappeared, leaving a reddish superficial loss of substance, which, however, soon healed. The cases lasted for eight or ten days. No deaths were observed. Five healthy sheep introduced from a di,tant pasture contracted the complaint in from three to six days. The disease could not be conveyed to horses or oxen. (Vigadi, Allatorvosi Lapok, 19 0 5, p. 345, ex. Dettts. Tieriirztl. Wochcns., No. 27, 7th July 1906, p. 325.)
DISSECTING ANEURISM IN THE HORSE. DURING the past few months Petit has seen and described three cases of the above condition. In that mentioned below the subject was a cab horse which died suddenly and without visible cause. On post-mortem examination Ihe aortic trunk and the first portions of the anterior and posterior aort:e were surrounded by a thick layer of coagulated blood, which had first found its way into the periartenal c.onnective tissue beneath the visceral layer of the pericardIUm. This semi-organised layer, which was of rapid formation, had again become ruptured, and the pericardial cavity ultimately contained a voluminous clot, which, by pJ;essing on the heart, had caused death. On incising the aorta the rupture was seen to extend transversely for several centimetres across the vessel, opposite the space separating two sigmoid valves. This seems the commonest point of origin in ruplure of the aorta, though the phenomenon is not constant, Petit having recently descnbed a case of rupture at the bifurcation of the vessel.