. Diseases of cattle, sheep, goats and swine. Veterinary medicine. Fig. 249.—Adult sheep tick {Melo2)liagus oviniis). (a) Tick ; (6) puparium. Magni- fied. (Salmon and Stiles, Annual Keport, Dept. of Agi-iculture, 1897, p. 103.) ¥—Tricho- clectes scalaris of the ox. Mag- nified 20 dia- meters. (After Railhet.) ticularly in the case of animals, such as oxen, which are given to licking themselves. SCABIES—SCAB—MANGE. The term scabies is given to a group of diseases affecting man and all domestic animals. These diseases are produced by two classes of parasites, viz., sarcoptinse, wh
. Diseases of cattle, sheep, goats and swine. Veterinary medicine. Fig. 249.—Adult sheep tick {Melo2)liagus oviniis). (a) Tick ; (6) puparium. Magni- fied. (Salmon and Stiles, Annual Keport, Dept. of Agi-iculture, 1897, p. 103.) ¥—Tricho- clectes scalaris of the ox. Mag- nified 20 dia- meters. (After Railhet.) ticularly in the case of animals, such as oxen, which are given to licking themselves. SCABIES—SCAB—MANGE. The term scabies is given to a group of diseases affecting man and all domestic animals. These diseases are produced by two classes of parasites, viz., sarcoptinse, which live within the epidermis or on the surface of the skin, and demodectes {sing, demodex), which penetrate into the sebaceous glands and hair follicles. Scabies, though known from the earliest times, has long been con- founded with constitutional diseases characterised by cutaneous erup- tions. The symptoms shown were formerly regarded as due to the elimination of "humours" which the organism was casting off, for which reason scabies was even treated with internal medicines. At the present time the cause of the disease is perfectly well under- stood, as well as the mode of development of the different parasites. The rate at which these parasites develop is almost incredible, a fact which explains the highly contagious character of the disease. Each species of animal may present several varieties of scabies, caused by different parasites, such as sarcoptes, psoroptes, chorioptes, demodectes, etc. SCABIES IN SHEEP. Scabies in sheep usually assumes one of three forms—sarcoptic, psoroptic, or chorioptic scabies. Follicular, or demodectic, mange affects R K 2. 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, Jno. A. W. (John A. W. ). Chicago : American Veterin
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectveterin, bookyear1920
