The Animal Parasites of Sheep

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

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Página 174 - 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 28 - Original. that his words are repeated: "the moment the fly touches this part (the nose) 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 fly pursues. They also "smell to the grass," as they go, lest one should be lying in wait for them.
Página 207 - 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 25 - ... 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 color. On the under side it is of the same color, but...
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 93 - Diesing, the fringed tape-worm, is at present the most common parasite of the sheep of our Western plains, and causes by far the greatest loss of any intestinal parasite in this country.
Página 57 - From the summit of each elevation or papule, a watery, serous fluid exndes and accumulates, which transforms them into vesicles and pustules, and which in drying cover them over with a thin crust. In a few days the whole surface is covered with a yellowish, greasy, scaly layer, under which the parasites are hidden. As the disease proceeds this layer gradually increases in thickness by an increase of the serous...
Página 25 - The antenae 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 cannot therefore take any nourishment. The wings are transparent and extend beyond the body, and the winglets, which are quite large and white, cover entirely the poisers.
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 subject of legislation in most countries, and yet, if proper precautions were taken and a rational treatment followed, this...
Página 42 - Water 50 gallons. Dissolve the soap in a gallon or more of boiling water, add the acid, and stir thoroughly. Keep the mixture well thinned, and do not let it get into the mouth, nostrils, or eyes of the sheep.

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