82 DISEASES OF SWINE 



should also be cleaned up. It is not an easy matter 

 to get rid of hog lice, and it may be necessary to 

 move the animals to new quarters for a few weeks. 

 A two per cent, solution is more effective for de- 

 stroying lice than a one per cent., and the herd 

 should be dipped twice at intervals of one week or 

 ten days. After dipping or washing them, the Ifogs 

 should be kept out of the hot sun until dried off. 



PITCH MANGE— ECZEMA 



Acute and chronic inflammation of the skin is not 

 an uncommon disease in hogs. This is not due to a 

 susceptibility of this class of animals to skin diseases, 

 but more to the conditions under which they are kept. 



Causes. — This disease is associated with unhy- 

 gienic conditions, filthy pens, extremes of heat and 

 cold, and a debilitated condition. Light skinned hogs 

 and those having a light coat of hair are apt to suf- 

 fer from inflammation of the skin during the hot 

 weather, as a result of irritation from the sun's rays, 

 especially if kept in muddy yards. A severe slough- 

 ing of the skin may occur if hogs are allowed to 

 wallow in pools of water, that sometimes form in the 

 places where corn-cobs have been burned into char- 

 coal. Eczema sometimes occurs in a drove of hogs 

 that are kept on marsh land because of the irritating 

 properties of the soil. Inflammation and sloughing of 

 the skin may occur in hog cholera, articular rheuma- 

 tism, and other germ diseases. 



Symptoms. — In white hogs the affected parts of 

 the skin may appear red, inflamed, swollen, and tender. 



