The Animal Parasites of Sheep

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U.S. Government Printing Office, 1890 - 222 páginas
 

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Página 25 - ... variegated with dark brown and straw color. On the under side it is of the same color, but not variegated in the same way, there being a dark spot in the middle of each ring. The feet are brown, the under side of the head is puffed out and white. The antennae are extremely small and spring from two lobes which are sunk into a cavity at the anterior and under part of the head. The eyes are purplish brown, and three small eyelets are distinctly visible on the top of the head. It has no mouth and...
Página 185 - Bihar, pisolitic concretions of hydrated iron peroxide, from the size of a mustard seed to that of a pea, are disseminated through the clay ; occasionally these nodules attain larger dimensions, some being found, near Dinajpur of the size of pigeons
Página 30 - ... development at the commencement of spring-time, that they occasion morbid troubles. The latter begin by a discharge, often unilateral, which is at first clear and serous, then thick and mucous. Frequently there is sneezing and snorting, accompanied by the expulsion of mucus and sometimes of (Estrus larvae. Later the animals turn the head backward, often shake it, rub the nose against the ground or some other object within reach, or with their front feet. As the malady gradually advances the sheep...
Página 28 - the fly touches this part of the " sheep, they shake their heads, " and strike the ground violently " with their fore-feet ; at the same " time holding their noses close to " the earth, they run away, looking " about them on every side, to see "if the...
Página 91 - The life of the embryo from the time it leaves one sheep until it is found in another is yet undiscovered. When present in considerable numbers in sheep it determines a disease which is not only detrimental to the value of the animal, but at times causes the death of large numbers. No medicinal remedies can be recommended which will assuredly remove the parasite from the host.
Página 11 - ... infestation in sheep, the fluid accumulating under the lower jaw and giving rise to the so-called " bottle jaw." In this connection, the advisability of finding out promptly the cause of the trouble when sheep become diseased should be emphasized. Curtice has stated the case as follows : The sheep owner who discovers weakness among his lambs should not wait until one of them dies before he endeavors to make a diagnosis, but should undertake to diagnose the disease in the earlier stages by sacrificing...
Página 196 - The needle of the syringe must be provided with a removable solid rod or trocar, so as not to become plugged when it is pushed through the skin and walls of the trachea. As the needles are apt to break, a number of them should be kept on hand. After the operation the syringe should be carefully washed in pure water, the piston supplied with a drop of olive oil, and the trocar replaced in the needle. It is best TO disinfect by filling the syringe and needle with a 5 per cent, solution of carbolic...
Página 57 - In places the wool is stuck together in masses; in others it fails, white in others, which are apparently sound, it can be easily plucked off. The rubbing and scratching indulged in by the sheep not only tend to tear away the wool but increase the irritation of the skin, which may become intensely inflamed and swollen and finally end in a superficial death of the part.
Página 56 - Of all the diseases of sheep in this country, scab is the most feared by the flockmaster. So insidious is its attack, so rapid its course, so destructive its effects, and so difficult is it to exterminate that it has justly earned the distinction of being more injurious than any other disease caused by external parasites. Scab alone, of the parasitic diseases, has become the...
Página 57 - ... some minute elevations, which differ from the surrounding skin in being slightly whiter or yellower, and which have been produced by the bites of the pests. The insects themselves can be found among the hairs at but little distance from the bites. As time passes and the insects multiply in numbers these elevations become more and more numerous, and closer and closer together, until they finally unite over a considerable extent. From the summit of each elevation or papule, a watery, serous fluid...

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