102 SPECIAL CATTLE THERAPY 



which gives constantly uniform results. Many cases 

 resist all forms of treatment and the condition goes 

 on in spite of anything which may be done. Until the 

 pathology of this disease is more fully understood we 

 can hope to make but little progress along the lines 

 of curative treatment. 



HERPES TONSURANS 



This is an affection of the skin. It is commonly 

 known as ''ring-worm." 



The form of ring-worm disease which is the most 

 common in cattle is slightly different from that in 

 other animals as regards clinical manifestations. It 

 is characterized by the appearance of layers of bark- 

 like, or almost wart-like, formations on various parts 

 of the body. 



The parts of the body most frequently involved are 

 the head, croup, anal and vulvar region, and withers. 



The disease commonly is infectious and trans- 

 missible in nature, usually affecting a number of ani- 

 mals in the herd. It is transmissible to man also, and 

 the caretaker of infected animals not infrequently 

 develops the disease. It is presumed that the infection 

 is spread by currycombs and brushes and similar 

 agencies. The disease is slightly more prevalent in 

 young cattle than in old ones, and occurs under all 

 conditions of housing as well as at pasture. 



The first recognizable manifestation of this malady 

 consists of the appearance of very small, hard and 

 rounded, wart-like nodules. They may make their ap- 

 pearance on various parts of the body simultaneously; 

 usually, however, the different locations become in- 

 volved successively. In this stage there is some pru- 



