530 



CrCLOPEDIA OP LIVE STOCK AND COMPLETE STOCK DOCTOR. 



rv. Mange. 

 This is a parasitic disease that is due to a class of 

 insects called acari, of which there are three kinds 

 that trouble the horse, viz : the 

 sarcoptes, dermatophagus and dermato- 

 coptis. The first named burrows in 

 the deeper layers and cracks of the 

 skin, while the last two live on the 

 surface, under the scabs, where, of 

 course, they are more easily got at than 

 the former, and hence are less difficult 

 to treat. 



How to know it. — There is a terri- 

 ble itching that cannot be satisfied ; 

 the more the horse rubs, the more 

 he itches. Horses with the mange 

 will sometimes be found turned out to pasture, and rubbing and scratch- 

 ing against posts, trees, fences, etc., or even against one another. As 



HCEMATOPINUS, OR 

 BLOOD-SUCKING 

 LOUSE OF THE 

 HOKSE AND ASS. 



TRICHODECTES 

 OR BIRD LOUSE 

 OF THE HORSE. 



DERMATOPHAGUS EQUI. 



DERMATOCOPTES EQUI. 



the mites possess great vitality, and will live a long time away from a 

 horse, those left on the posts, etc., will infest any other horse coming in 

 contact with it weeks, or even months, afterward. Mange is contagious 

 by actual contact. The skin gets rough and scaly ; the hair comes off 

 in patches ; the skin gets pimply, and when rubbed much, gets quite raw. 

 It usually affects the head and neck first, sometimes spreading so as to 

 take the hair entirely off. Its spread is quite rapid, and keeps the horse 

 in agony all the time. He will push against your hand, in evident 



