854 



Eczema. 



liness, after repeated recurrences of the acute form and affect 

 the same parts of the body. 



Monssii and Mathis saw seborrheic eczema in cattle. The 

 affection, which develops slowly, begins with loss of hair, in 

 consequence of which either the whole of the body is involved 

 with ringworm-like, round, or elliptoid, and very scaly spots 

 covered with greasy lamellous scabs, or the neighborhood of 

 the natural openings of the body is alone affected. 



The skin is very slightly thickened but elastic. The affec- 

 tion gradually becomes worse, and finally leads to complete loss 

 of hair, although this may grow again in time. The general 

 health and condition suffer no damage. 



Megnin saw a recurrent eczema which had existed in a cow for three years; 

 it began in the region of the loins with the development of little vesicles ; every 

 succeeding spring the disease recurred, adA'ancing to the adjacent parts, and finally 

 the greater part of the upper portion of the body was attacked, although the 



Fig. 124. Eczema seltorrhfeicum. (After IMoussu.) 



affection was limited exclusively to the unpigiuented parts of the skin. The small 

 vesicles soon burst. The moist red spots were covered with granular crusts, and 

 finally at the onset of winter copious excoriation as well as descpianiation was 

 visibfe. On autopsy the bones were remarkable for their dark color, and the trans- 

 verse section of the long bones showed on the outer border three dark rings which 

 corresponded to the recurrences. 



Mouroux observed a similar trouble in spotted cattle, which, however, 

 began with general disturbances (loss of appetite, cessation of rumination, con- 

 stipation and moderate tympany) as well as emaciation; it also attacked only the 

 unpigmented jiarts of the skin and persisted only during the warm time of the year, 

 from May to October. The hair grew again later on in four-fifths of the cases. 

 The course of the complaint was always favorable. 



Gualducci and de Benedictis described a peculiar nodular eruption ("Fuoco 

 selvatico") in young cattle and cows which likewise usually begins in the early 

 spring and heals in the autumn; only seldom it lasts into the winter. Numerous 

 no<lules occur on the sides of the bo(iy, about the knees, on the posterior surfaces 

 of the fore limbs, rarely also on the inner surfaces of the extremities. After the 

 nodules have dried into crusts, these fall off with the hair, whereupon a fresh epi- 

 thelial layer is formed and a light scar remains. Healing progresses undisturbed if 

 scratching or licking of the affected parts of the body is prevented. 



Finally, Noack and Prietsch observed, each in an ox, an extensive generalized 

 papulous eczema that was followed by the loss of the entire coat of hair. 



