Handbook of meat inspection . bercles in question are distinguished macroscopicallyfrom glanderous tubercles by the absence of a red zone, by theirtendency to calcify, and farthermore by the homogeneous characterof the tubercles, the absence of small tubercles associated with. RESPIRATORY APPARATÜS 329 large ones, tbe abseuce of otlier glaudorous alterations, and by theiutepjrity of the bronchial glands. It slionhl l)e noted, however, thatthe tubercles in questiou maj appear in the lyinph ghmds. The etiology of these non-glanderous pulmonary tuberclesappears to be a variable one. In one case M
Handbook of meat inspection . bercles in question are distinguished macroscopicallyfrom glanderous tubercles by the absence of a red zone, by theirtendency to calcify, and farthermore by the homogeneous characterof the tubercles, the absence of small tubercles associated with. RESPIRATORY APPARATÜS 329 large ones, tbe abseuce of otlier glaudorous alterations, and by theiutepjrity of the bronchial glands. It slionhl l)e noted, however, thatthe tubercles in questiou maj appear in the lyinph ghmds. The etiology of these non-glanderous pulmonary tuberclesappears to be a variable one. In one case Martin succeeded indemonstratiug fnufrous mycelia in the tubercles. Willach claims tohave observed distomes in the pathological foci. It was demon-strated by the systematic investigation of Olt, Grips, Schütz andKünnemann, that the gray transparent and later calcareous fibrouspulmonary tubercles represent emboli or miliary chronic pneu-nioniic whicli are produced by animal parasites, usually the larvaBof uematodes. Fig. Entozoic pulinonary tubercles of a pneumonic form in the horse (after 01t). o. inflamed alveoli; h, part of a nematode larva: c, connective tissue capsule of the parasitic focus;. X 30 diaineters. The parts of the worins are raagnified 80 diameters. 01t found at the abattoir in Stettin that the non-glanderouspulmonary tubercles whicli were very frequent in that locality werecaused by embolic iuvasiou of echinococci which became prema-turely disintegrated in the lumen of the blood vessels. In Pomerania,u region in which the echinococcus disease is very prevalent in manand domestic auiraals, seventy per cent. of the slaughtered horses,according to 01t, were infested with the tubercles in question. Infurther iuvestigatious, 01t demonstrated that the tubercles usuallycontain uematodes (probably the larvoB of StrongyJus annalus).Conceruing the seat of these entozoic tubercles, 01t maintains thatthey lie under the sera or in the pulmonary pareuchyma, but uever
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