CHAPTER XIV. 



DISEASES OF THE SKIN.— EXTERNAL PARASITES. 



MANGE (Sarcoptic), ALOPECIA. 



MANGE (Follicular), WARTS, 



ECZEMA, FLEAS 



ERYTHEMA, LICE, 



RINGWORM (Proper), TICKS. 

 RINGWORM (Honeycomb), 



MANGE (Sarcoptic). 



The term " mange " is generally used by those people who 

 dabble in canine matters without the knowledge necessary 

 to diagnose correctly, to denote any affection of the skin 

 which results in eruption, irritation, or the detachment of 

 hair. 



The true mange of the dog is analogous to the itch of 

 man, and the riff of the horse. It is due to the presence of 

 a small acarus {Sarcoptes canis) — Fig. 22. Another species, 

 termed Follicular mange, is also very frequently met with 

 in dogs. This likewise is due to the presence of an acarus 

 (Acarus folliciilorum or Demodex caninus) — Fig. 23. 



Mange, of whichever species, can only be propagated by 



the migration, directly or indirectly, of the parasite giving 

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