SWINE DISEASES AND THEIR CONTROL 195 



the knowledge of the herdsman. It affects the mouth 

 and adjacent parts and may extend to the nostrils, and 

 even to the stomach and intestines in severe cases. It 

 is caused hy a specific micro-organism (bacillus nc- 

 crophorus). Congestion of the lips and gums, salivaton 

 and the occurrence of necrotic patches in the later stages 

 are primary symptoms. A foul odor is often present. 

 Diarrhea, prostration and emaciation occur in advanced 

 stages, followed by death in from two to six weeks. 

 Where it occurs the infected animals should be isolated 

 and their mouths or heads dipped daily in a 2 per cent 

 solution of creolin or good coal tar dip. 



Urticaria or nettle rash. — Concurrent with the above- 

 described disease there frequently occurs a general herd 

 infection of urticaria or nettle rash. This disease arises 

 from skin irritations resulting from various causes, and 

 is characterized by skin eruptions on various parts of the 

 body, especially on the inside of the thighs, the belly, 

 between the forearms and back of the ears. Cleanliness, 

 sanitation, disinfection and prevention of skin irritations 

 are the best methods of prevention. Non-irritating dips, 

 such as five gallons of water to which has been added 

 six ounces of cresylic acid compound, U. S. P., or a two per 

 cent solution of a good coal tar disinfectant should be used. 



Eczema.- — Conditions under which some hogs are kept 

 render them susceptible to a chronic skin disease char- 

 acterized by inflammation and tenderness, followed by 

 watery vesicles or blisters, which change to pustules. 

 The disease can easily be prevented by sanitation, disin- 

 fection and proper use of sanitary hog wallows contain- 

 ing a weak solution of coal tar dip. 



