. The diseases and disorders of the ox, with some account of the diseases of the sheep. DISEASES OP THE OX AND SHEEP. 245 beneath the mucous membrane of the digestive tube. The lungs are turgid with blood, and the heart is marked both externally and internally with dark purple spots and filled with dark and partly coagulated blood. As in black quarter, extravasations of blood are to be seen, and these are probably caused by sudden congestions, attended by rupture of the vessels and consequent effusion. Sometimes a sheep may live for several days ; but as a rule the animal is actually dead with
. The diseases and disorders of the ox, with some account of the diseases of the sheep. DISEASES OP THE OX AND SHEEP. 245 beneath the mucous membrane of the digestive tube. The lungs are turgid with blood, and the heart is marked both externally and internally with dark purple spots and filled with dark and partly coagulated blood. As in black quarter, extravasations of blood are to be seen, and these are probably caused by sudden congestions, attended by rupture of the vessels and consequent effusion. Sometimes a sheep may live for several days ; but as a rule the animal is actually dead within a couple of hours from the time when it was in the enjoyment of good health. This suddenness seems to be due to a general clotting of the blood within the smaller vessels of the tissues. Now we proceed to give a short description of the germs which cause anthrax fever. We propose to follow the admirable. / \ Fig. 28.—Fkesh Specimen of Blood taken from the Heart of a Mouse WHICH has died of Anthbax. 1. Blood discs. 2. White blood-corpuscle. 3. Bacilli anthracis. Magnifying power 700. After Klein. account of them given by our former tutor, Dr. Klein. In the blood of any animal which has died of anthrax numbers of stiff rods differing slightly in length are found. Koch succeeded in cultivating these bacilli artificially, and showed that they multiply by division, and grow so as to become long, homogeneous- looking filaments, which are straight or twisted. If free access of air is allowed, bright oval spores appear in them, and the filaments become homogeneous and swollen. These spores then become free, and, when artificially cultivated-ftnd injected into an animal (rodent), they germinate into the characteristic bacilli. These bacilli elongate and divide, and in artificial cultures again grow into long filaments, which again form spores. The single bacilli measure between 0*005 and 0'02 mm. in length, and between O'OOl and 0*0012 mm. in Please note that these images
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherlondo, bookyear1889
