The domestic sheep its The domestic sheep : its culture and general management domesticsheepits01stew Year: 1900 360 THE DOMESTIC SHEEP. drop from the diseased sheep on to the ground, where other sheep may He, and others lying on the same ground, will of course become infected. They are rubbed off as the sheep scratch themselves in the vain effort to get relief, on fences, walls, and other places, and the infection easily spreads from these. As a flock passes on the road, another following will easily pick up the contagion. Sheep cars are notorious sources of infection obviously, and one sc
The domestic sheep its The domestic sheep : its culture and general management domesticsheepits01stew Year: 1900 360 THE DOMESTIC SHEEP. drop from the diseased sheep on to the ground, where other sheep may He, and others lying on the same ground, will of course become infected. They are rubbed off as the sheep scratch themselves in the vain effort to get relief, on fences, walls, and other places, and the infection easily spreads from these. As a flock passes on the road, another following will easily pick up the contagion. Sheep cars are notorious sources of infection obviously, and one scabby animal may infect thou- sands on a range which may follow in its track. This form of the disease is specially different from the other two, and cannot be mistaken for either of the others. It is indis- pensable, considering the enormous increase in the numbers of it, that instant measures be taken for its destruction and the saving of the flock. Fortunately the location of the pest makes its first appearance so prominent that no mistake can be made in distinguishing it, and then the remedy is easy. This is to wash the parts affected in any of the dips to be procured in the mar- ket, or of any of the ointments made for this purpose, or to apply any kind of sweet thin oil rubbing it well into the scabs after washing with carbolic or tar soap, and repeating the treatment until it is certain that it has been effective. THE COMMON SCAB MITE—PSOROPTES COMMUNIS. This is the most to be feared by the shepherds of all the ex ternal parasites of the flock. It is a much larger insect than tlie head mite, and is visible to the unaided eye if gathered on some Fig. 29.—Male and Female Scab InsectSo white surface. It has been so neglected, as seems to be the rule, left for some one else to attend to, that it has gained an almost impregnable footing through the whole world. It has thus become the subject of legislation in many countries, but this as
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