. Diseases of cattle, sheep, goats and swine. Veterinary medicine. 302 DISEASES OF THE LIVER. animals, being well nourished and fat, are able to resist the first attacks of the parasite, so that even an observant shepherd only notices a little dulness, want of condition, and muscular weakness. It requires a care- fully trained eye to note these very general symptoms, for the bodily condition only changes very slowly and progressively, the appetite remain- ing good. Experienced butchers, however, in the districts where disto- matosis is common, readily detect this condition. The animals make li
. Diseases of cattle, sheep, goats and swine. Veterinary medicine. 302 DISEASES OF THE LIVER. animals, being well nourished and fat, are able to resist the first attacks of the parasite, so that even an observant shepherd only notices a little dulness, want of condition, and muscular weakness. It requires a care- fully trained eye to note these very general symptoms, for the bodily condition only changes very slowly and progressively, the appetite remain- ing good. Experienced butchers, however, in the districts where disto- matosis is common, readily detect this condition. The animals make little resistance when handled. Nevertheless, even in this primary phase, the conditions are not always. Fig. 158.—Drawing from a microscopic preparation showing a fluke in the tissue of the liver, a, Necrotic Hver tissue ; h, atrophic liver cells ; c, spines on the fluke, showing the outline of the body. (After Schaper, 1890, PL III., Fig. 5.) as above sketched, and a certain number of deaths may occur. Gerlach has mentioned the possibility of death by cerebral apoplexy, in conse- quence of the young distomata penetrating to the brain. Moussu has certainly never seen such a complication, but has seen death from hepatitis, perihepatitis, and secondary pericarditis in animals gravely infested. The young embryos, whether they penetrate only by the bile ducts, as has been stated, or are carried to the liver by the blood stream, often excavate canals in the substance of the gland before establishing themselves in the bile ducts. They make their way as far as Glisson's capsule, and may even penetrate it; and as they carry with them innumer- able intestinal germs, when they arrive via the bile ducts, they set up. 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 Moussu, Gustave, 1864-; Dollar, John A. W. , joint aut
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