Diseases of cattle, sheep, goats Diseases of cattle, sheep, goats and swine diseasesofcattle00mous Year: 1920 G98 INFECTIOUS DISEASES. When the glands of the anterior mediastinum are affected, they cause compression of tlie anterior vena cava, with stasis of blood in the jugular vein and venous pulse, then compression of the cesophagus and trachea, and of the'nerves at the entrance to the chest, producing difficulty in swallowing, respiration and circulation. If, as often happens, the glands of the posterior mediastinum are Fig. 278.—Well-developed tuberculosis of the mediastinal lymphati
Diseases of cattle, sheep, goats Diseases of cattle, sheep, goats and swine diseasesofcattle00mous Year: 1920 G98 INFECTIOUS DISEASES. When the glands of the anterior mediastinum are affected, they cause compression of tlie anterior vena cava, with stasis of blood in the jugular vein and venous pulse, then compression of the cesophagus and trachea, and of the'nerves at the entrance to the chest, producing difficulty in swallowing, respiration and circulation. If, as often happens, the glands of the posterior mediastinum are Fig. 278.—Well-developed tuberculosis of the mediastinal lymphatic glands. PG, Left lung; PD, right lung; Q*], oesophagus; A, posterior aorta; T, tuberculous lymphatic glands. affected and greatly enlarged, they may involve the oesophagus and the oesophageal nerves, interfere with deglutition and rumination, and thus produce marked disturbance. The animals only swallow with difficulty, and later rumination becomes impossible, the anti-peristaltic movement not being powerful enough to overcome the resistance. Soon after eating, the patients exhibit tympanites, certainly only to a moderate extent, but the swelling is long in disappearing. This
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