ACARUS DEM ODE X FOLLICULORUM 



4G9 



Prevention Methods. — The owner of the dog must have his attention 

 called to the fact that the sarcoptes are highly contagious, and may pro- 

 duce similar complications in other dogs and in man; and while this in 

 man may be of a very mild character, it has been observed in the acute 

 form in several cases. 



The contact of many dogs with healthy animals must be prevented 

 and covers, blankets, bedding, etc., which have been used by the affected 

 animals must be subjected to a thorough cleansing by washing with hot 

 solutions of soda and a high degree of heat. The straw, of course, must 

 be burned. 



FOLLICULAR MANGE. ACARUS MANGE. ACARIASIS. 

 Acarus Demodex Folliculorum. 



Follicular mange is a very serious affection due to the presence of 

 the acarus demodex folliculorum in the skin and particularly the hair- 



1:100. 



Fig. 168. Fig. 169. Fig. 170. 



Fig. 168. — Development of the acarus folliculorum: Egg; six-legged larva; eight-legged larva, and 

 developed larva. 



Fig. 169. — Acarus folliculorum greatly magnified. 



Fig. 170. — Hair-follicle invaded by demodectes folliculorum. 



follicles. It differs from sarcoptic mange in that it is rarely itchy, and 

 if so, only very slightly. 



Description of the Acarus. — This parasite is about 0.3 mm. in 

 length and about 0.045 mm. in breadth, elongated, lanceolate, with a 



