. A text-book of bacteriology, including the etiology and prevention of infective diseases and a short account of yeasts, and moulds, haematazoa, and psorosperms. Bacteriology. TDBERCDLOSIS. 389 Tuberculosis of Cattle. In cattle the disease may occur as the result of inhaling bacilli, or of ingestion with food. It is very frequently found in the lungs; and calves may be infected by milk from cows with tubercular udders. Calves may also suffer from congenitiil tuberculosis, the bacilU having been transmitted from the mother during gestation. Breeding in-and-in, over-production of milk, and conf
. A text-book of bacteriology, including the etiology and prevention of infective diseases and a short account of yeasts, and moulds, haematazoa, and psorosperms. Bacteriology. TDBERCDLOSIS. 389 Tuberculosis of Cattle. In cattle the disease may occur as the result of inhaling bacilli, or of ingestion with food. It is very frequently found in the lungs; and calves may be infected by milk from cows with tubercular udders. Calves may also suffer from congenitiil tuberculosis, the bacilU having been transmitted from the mother during gestation. Breeding in-and-in, over-production of milk, and confinement with insanitary surroundings, predispose to tuberculosis. The disease is known in Germany as " Perlsucht" ; and in this country the lesions on the pleura are known as " grapes," and the animals themselves are commonly called " ; The disease may also exist in the lungs or in other organs, in a limited form, without any indication of ill health. In such oases the disease can be detected by injection of tuberculin, a marked rise of temperature occurring in tubercular animals. In advanced cases, the symptoms commonly observed •ire cough, difficulty in breath- ing, staring coat, wasting, and diarrhoea; and if the udder is infected, nodules in the gland, and thin bluish milk. In the lungs, after slaughter, a few small cheesy tubercles may be found in animals apparently in perfect health and in prime condition for the market. In advanced cases, the lungs on section show large yellow masses, containing calcified matter, and the bronchi may be full of yellowish pasty contents. The disease will be found to involve the bronchial glands. The serous membrane may be covered with little warts or grape-like masses. The lymphatic glands may be enlarged to an enormous size. Tubercular ulceration of the intestine is sometimes found, but not commonly. In tubercular disease in the udder, a painless swelling is found which may affect one or more quai't
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