DESCRIPTION OF PLATES.
Plate XXXIX. Actinomycosis. (From Jöhne's Encyklopädie d. gesammt. Thierheilkunde.)
Fig. 1. Actinomycosis of the jaw. The lower jawbone has been extensively eaten away by the disease.
Fig. 2. Actinomyces fungus from a tumor of the jawbone in cattle, magnified 550 times.
Plate XL. Actinomycosis of the jaw. (Reduced one-half. From Jöhne's Encyklopädie d. gesammt. Thierheilkunde.) The lower jaw is sawed through transversely, i.e., from right to left, and shows the disease within the jawbone itself; a, within the mouth, showing the papillæ on the mucous membrane of the cheek; b, front view of a molar tooth; c, the skin covering the lower surface of the jawbone; d, the jawbone hollowed out and enlarged by the formation of cavities within it, which are filled with the soft growth of the actinomycotic tumor. The section makes it appear as if the bone were broken into fragments and these forced apart; e, a portion of the tumor which has broken through the bone and the skin and appears as a tumor on the cheek. The little roundish masses represent the granulomata (minute tumors) in which the fungus vegetates.
Plate XLI. Actinomycosis of the lungs.
Fig. 1. Transverse section of the ventral lobe of the right lung, from a case studied in the laboratory. The yellowish dots represent the places where the actinomyces fungus is lodged. The larger yellowish patches are produced by the confluence of a number of isolated centers. The entire lobe is of a dark flesh-red color, due to collapse and bronchopneumonia.
Fig. 2. The cut surface of a portion of the principal lobe of the same lung, showing the recent invasion of antinomycosis from the other lobe: a, large air tube; b, artery; c, a pneumatic lobule; d, lobule containing minute yellowish dots. In these the actinomyces fungus is lodged.
Fig. 3. Cut surface of a small portion of another lung, showing a few lobules, a. The fungus is sprinkled throughout the lung tissue in the form of yellowish grains, as shown in the illustration. The pleural covering of the lung tissue is shown in profile above.