The Animal Parasites of Sheep

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

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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 25 - On the under side it is of the same color, bnt 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 can not therefore take any nourishment. The wings...
Página 197 - 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 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 mimbers.
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 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 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 28 - ... where they crowd together during the heat of the day, with their noses held close to the ground, which renders it difficult for the fly conveniently to get at the nostrils.
Página 25 - ... more, according to the weather, when the fly pushes open a little round cappiece at the head and thus arrives at maturity. In this stage it looks something like an overgrown house fly. The ground color of the upper part of the head and thorax is dull yellow, but they are so covered with little round spots and atoms (scarcely distinguishable without the aid of a magnifier) that they have a brown appearance. The abdomen consists of five rings, is velvety and variegated with dark brown and straw...
Página 57 - In places the wool is stuck together in masses; in others it fails, while 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.

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