. A text book of veterinary pathology, for students and practitioners. Veterinary pathology. INFECTIVE GRANULOMATA. 351 when the tubercle is from six to eight months of age and is ex- tensive by the time the lesion is one year old. Tubercular masses are occasionally observed in the lung, bronchial ur mediastinal glands, and in the liver. These masses may contain all stages of tubercular formation or the entire mass mav all be in the same stage of devehjiMuent, as liquefying necrosis, cascatiun or calcifi- cation. Tuberculosis of serous memliranes nf bnvincs should receive special mention becau
. A text book of veterinary pathology, for students and practitioners. Veterinary pathology. INFECTIVE GRANULOMATA. 351 when the tubercle is from six to eight months of age and is ex- tensive by the time the lesion is one year old. Tubercular masses are occasionally observed in the lung, bronchial ur mediastinal glands, and in the liver. These masses may contain all stages of tubercular formation or the entire mass mav all be in the same stage of devehjiMuent, as liquefying necrosis, cascatiun or calcifi- cation. Tuberculosis of serous memliranes nf bnvincs should receive special mention because of the characteristic appearance of the lesions. Bovine serous membrane lesions varv in size from a millet seed to a walnut, but arc usually aliout tlie size of a pea. These lesions are freipicntly thickly studded over large areas of a serous membrane. The nodules are surrounded l)v a firm cap- sule \yliich causes them to appear as pearhHk'e 1)odies, ,:in(l !i,:-i;rr. Fig. 196.—Photograph of a tubercular gland, i-ix the name, "pearly disease.'' Sometimes serous membrane tuber- cular lesions are very extensive; this type may be called "mass ; Porcine Tnbcradar lesions are characterized by enlargement of lymphatic glands, the formation of tubercles of variable sizes in or upon serous membranes and within the substance of glandular organs, bones and other connective tissues. The tubercles pro- duce increased density of invaded soft tissues and are, therefore, easily detected except in very recent infection. The tubercular nodules in the early stages present about the same color as tlie surface of the tissue invaded. In sectioning the tubercle the cen- tral portion is caseous and slightly yellow or fibrous and Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kins
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectveterin, bookyear1910
