832 Excessive SAveating. 



Tn a few other cases of hyperidrosis no manifest cause could be discovered. 

 Thus it occurred iu a dog after catching cold (Holter])ach) and in a horse after 

 feeding too largely on clover (Dages). 



Symptoms. Single parts of the body of the resting ani- 

 mals appear saturated on one or both sides, and in consequence 

 the hair appears darker. Sometimes the sweating is so severe 

 that the animal appears to steam and the sweat forms in drops. 

 The limit of the sweating region is generally sharply defined 

 in the middle line of the body; on the under parts of the body 

 it appears somewhat less sharply limited because the sweat 

 flows on to the other half of the body. While movement gen- 

 erally causes more secretion of sweat, it may occasionally cause 

 it to cease temporarily (Dupas). The disturbance is, as a 

 rule, limited to the region that is affected originally, but now 

 and again it may extend and involve further parts. 



In the region of excessive sweating there is often a lower- 

 ing of sensation in the skin, but sometimes on the contrary 

 hyperesthesia is noted. 



Course and Prognosis. Hyperidrosis is usually a transi- 

 tory affection which disappears of its own accord in a few 

 ■weeks or months. At times it persists but is not prejudicial to 

 the health of the animal (Schindelka). 



Treatment. Fomentations and frictions mth alcoholic 

 solutions and repeated subcutaneous injections of atropine may 

 be employed, but as a rule they do not visibly influence the 

 hyperidrosis. Kerlirzin saw a cure in a horse after treatment 

 with potassium iodide (6 gin. per day) for 6 days. 



Literature. Bielefeld, Pr. Mt., 1856-57, 103.— Brummel, Vet., 1900, 161.— 

 Dages, Bull., 1894, 441.— Delacroix, Rec, 1901, 17.— Dexler, Nervenkrkh. d. Pferdes, 

 1899, 2.38.— Dupas, Bull., 1904, 523; Eev. Vet. 1906, 398.- Emshoff, S. B., 1906, 

 184.— Forgeot, Bull., 1906, 597.— Holterbach, B. t. W., 1906, 282.— Kerlirzin, Rev. 

 vet., 1883, 114.— Richter, S. B., 1905, 331.— Roder, ibid., 1896, 137.— Schindelka, 

 Hautkrkh., b. Haustieren, 1908, 66. 



Blood-sweating. (Il^matidrosis.) Blood-sweating occurs as a 

 result of hemorrhage into the sudoriferous glands, whereby the blood 

 becomes mixed with sweat. In diseases with hemorrhagic diathesis 

 (purpura, ejc.) this anomaly occurs now and then (personal observa- 

 tion), although in these diseases it is due more to oozing of bloo ' 

 through the skin after loss of epidermal substance than to an actual 

 ]3erspiration of blood. Recently (B. t. W., 1907, 954) in a two weeks' 

 old calf von Milbradt noticed a trickling of clear red drops of blood 

 from the blo6d pores. 



3. Falling Out of Hair, Wool and Feathers. Alopecia. 



{Hairlessness, Baldness, Calvities.) 



Any falling out of the hair or a loss of hair in any part 

 of the ])ody other\\ise covered with hair is known as alopecia 

 when the trouble is not due to any organic or parasitic disease 



