Dandruff. 837 



Kutziier & Reichert recoiumend washing the skin with 2-3% luke- 

 ^val•n^ soda solution, and after it is dry, painting it with a 1% 

 solution of pyoetaninuni coeruleuni. The last mentioned method was 

 found ett'eetive by Schindler & JMoser if a 3% solution was applied 

 vigorously. 



By way of prophylaxis the stables and curry coml)s, as well as the 

 brushes should be disinfected. 



Literature. Bronec, T. Z., 1908, 45.— Kalkoff, Z. f. Yk., I,s92, 43; 1899, 263. 

 — Kutzner & Reichert, ibid., 1898, 223.— Eoiiier, D. t. W., 1899, 216.— SeluBdelka, 

 Ilautkrkh., 1908, 532.— Schindler & Moser, O. M., 1906, 193.— Teuuert, Z. f. Yk., 

 1902, 361. 



4. Dandruff. Seborrhoea. 



The excessive formation of sebum arises, according* to 

 Scliindelka, from a superficial inflammation of the skin ^\ath 

 hypersecretion of the sebaceous glands, on which account fluid 

 or oily secretions are excreted in considerable amount (sebor- 

 rhoea oleosa) or scales form on the skin consisting of fat and 

 the horny layer cells (seborrhoea sicca s. pityroides). The 

 trouble may aifect circumscribed places or develop all over the 

 body (seborrhoea universalis). 



Occurrence. These skin anomalies are chiefly observed in 

 sheep, horses, asses, dogs, and at times also in cattle. 



Etiology. The exact cause of the disease is not yet known. 

 Only so much is known that anemic animals, or those suffering 

 from internal diseases, are affected more frequently than healthy 

 ones, and that not infrequently certain skin diseases (eczema, 

 scab, acariasis, sclerodermia), severe infections, as well as 

 digestive diseases form the basis for an attack of seborrhea. 

 Very frequently no assignalile cause can l)e discovered. 



Symptoms. In horses the disease chiefly occurs on the 

 neck, rump and face, but exceptionally the whole surface of the 

 body may be attacked (Perrin). It occurs as seborrhoea sicca, 

 and is also called exfoliating herpes or rash. In cleaning the 

 animal mealy or bran-like scales are removed together w^itli 

 much hair. The coat appears dry, dull and as if filled with dust 

 (pityriasis seborrhoica), l)ut in addition bald spots form (alope- 

 cia seborrhoica s. furfuracea? s. pityroides) which alwaj^s in- 

 crease very slowdy. In other cases white, and later dirty gray, 

 fatty, thick crusts form Avitli a rancid smell, which in case of 

 an extensive involvement emanates from the patients them- 

 selves (Eoder). The skin appears either normal, reddened or 

 sometimes eczematous. 



In dogs sel)orrhoea sicca occurs mostly behind the ears, at 

 the neck, on the shoulders and tail, whence it may spread to ad- 

 joining parts of the body. Aside from mealy or bran-like 



