910 Herpes. 



while white hairs break off very seldom and then only partly, 

 so that the scabs then appear covered with short stumps of hair. 

 The remaining hairs may easily be pulled out on the affected 

 spots. 



The scabs at first adhere firmly to the skin, which after their 

 forcible removal, looks as if loosened in texture and bleeds, 

 but later on they are looser, especially in the middle portions, 

 after a purulent fluid has collected beneath them. Besides the 

 purulent fluid, one finds at this stage little pits in the reddened 

 skin, which have persisted, after lifting up of the hair roots and 

 of their thickened sheaths from the suppurating hair follicles 

 (Gerlach). 



After 1 to 2 months the scabs generally fall off and leave 

 a bald spot behind, whereupon desquamation continues for a 

 time, and the hairs begin to sprout again. Rarely, and only if 

 the scabs are thin, healing at first occurs in the center, while 

 at the borders the scab is still firmly attached (heii^es circinatus). 



Itching always accompanies the process, especially at the 

 time of development and of healing, still it varies considerably 

 in intensity. Thus Pusch has noted violent itching in Simmen- 

 thaler bulls, which disturbed the animals even while feeding, 

 but in grazing animals of the black speckled Holstein breeds 

 itching was almost entirely absent. 



Not infrequently the eruption extends, to the parts of the 

 body mentioned above, by the occurrence of fresh spots of herpes 

 in the neighborhood of the old ones (herpes tonsurans dis- 

 seminatus) and a coalescence of the patches is frequently noted 

 where the skin forms folds or where the animal can most con- 

 veniently rub itself (head, anal region). Pusch noticed in Sim- 

 menthaler bulls an extension of the spots from the tail to the 

 croup and to the flanks, but in this case bald places developed 

 without the occurrence of roundish spots; slight Ijronchitic 

 s^^nptoms were fairly frequent. By the continual development 

 of new ringworm patches the duration of the disease may be 

 prolonged to six months or a year (Gerlach) and at times it 

 causes "great thickening and folding of the skin in Holstein cat- 

 tle (elephantiasis, Kohler, Pusch). 



Ringworm sometimes develops in clipped cattle as herpes 

 tonsurans vesiculosus, in the form of slightly raised, red, hair- 

 less spots which gradually increase in size, a depression form- 

 ing in the center, and at the same time they become paler and 

 covered with soft lamellous scales, while the margin forms a 

 raised red circle composed of closely ranked nodules and small 

 vesicles. Desiccation of the contents Df the vesicles changes 

 these into small gimi-like crusts which can easilv be removed 

 (Schindelka). 



Schleiffer saw a contagious skin affection on the tips of the tail in cattle. 

 It was marked by the occurrence of round spots, redness, vesicle formation and by 

 violent itching; the disease was transmitted to the hands of the attendants, and 



