852 



Eczema. 



iciit inflammation of the hair bulbs, from the middle of which 

 a hair shaft emerges (eczema sycosiforme, Schindelka). In 

 consequence of the proliferation of connective tissue in the 

 coriuni and of its shrinking, the hair papillae disappear, the 

 fallen hairs are replaced by thinner ones, and later on no more 

 hair grows. In this way the hair of the tail becomes thinner, until 

 finally the root of the tail becomes quite bald, and only at the 

 places situated lower down whisps of hair remain (socalled rat 

 tail). 



Seborrheic eczema (Eczema seborrhoicum, TTnna) is met 

 with occasionally in horses (Megnin, Schindelka, Marek). The 

 affection connnences with the desquamation of many l)ran-like 

 scales. Then lamellae develop on the sides, on the nape of the 



Fig. 123. Eczema SpborrhreicTini. 



neck and on the head, which are rounded or elliptoid in shape, 

 as large as a dollar and up to 2 cm. in thickness; they are yel- 

 lowish-gray or gray, have a greasy luster, feel greasy, and are 

 depressed in the center. These lamellae mat the hairs together 

 and are easily removed with them. The skin is either only red- 

 dened (on the unpigmented parts of the body) especially around 

 the outer margin of the deposits, or it is slightly moist. Tlie 

 disease may in time affect the entire surface of the body in 

 which case the plaques, which are originally sharply circum- 

 scribed, may unite ; it causes no or at most but little itching. 



By suitable treatment it is easy to arrest the process for a 

 short time, but relay:>ses soon occur, so that the disease is hard 

 to cure definitely, and in the meantime may lea<l to exhaustion 

 of the patient. 



