292 THE STOCK OWNER S ADVISEE. 



This pruritis is supposed to be due to an acrid fluid which the 

 parasites deposit in the gallery in which it is lodged. This form 

 of mange is seen, as a rule, on the sides of the neck and withers, 

 and thence may extend over the entire body. Small, hard pim- 

 ples may be felt which contain a scab, which can be easily re- 

 m-^ 'd, exposing a surface an eighth of an inch in diameter. 

 Large surfaces become destitute of hair in the advanced stage. 

 The skin takes on the appearance of the rhinoceros. 



The symptoms of the presence of the dermatodectes are char- 

 acterized by great itching, with the formation of pustules, an 

 eighth of an inch in height, soon forming a vesicle, which rup- 

 tures and allows the serous contents to escape; these dry and 

 form a crust. These parasites are found at the upper border of 

 the neck and root of the tail; they spread more slowly and are 

 easier to cure than the sarcoptes. 



The symptoms of symbiates are a production of serum, which 

 forius into numerous crusts that break in large flakes. They do 

 not produce the same amount of itching as the other forms. 

 They are found on the limbs of horses, and merely bite the skin. 



Treatment of Mange. — First wash the animal thoroughly 

 with warm water and soft soap. The destruction is then to be 

 effected by applying carbolic acid, one part to sixteen of water. 

 This should only be applied on a part of the body at a time. It 

 is a good practice to have the animal clipped before making the 

 application. Solutions of the iodide of potassium and of the 

 iodide of sulphur have proven a most effective remedy, in pro- 

 portions of one ounce of iodide to eight of sulphur. Sulphur and 

 lard have been used with good results — one ounce of sulphur to 

 three or four ounces of lard. Staphisagria seeds, four ounces; 

 water, one gallon, boiled until the residue measures two quarts, 

 and applied to the skin as hot as can be borne is a most effectual 

 remedy. Mange in cattle and dogs will be dealt with in the 

 chapters on dogs and cattle. 



