A MAKGE PARASITE. 301 



MANGE, SCABIES, OR SCAB 



Is caused by a parasite (Psoroptes oris). The parasites 

 cause great irritation and itching. Sheep will rub them- 

 selves against anything. To make sure as to the para- 



Fig. 139. The mite or aearus known as Dermatodectes oris. Magnified. 



sites, remove a little scurf and examine with a pocket 

 lens or microscope. If neglected the parasites will spread 

 to a whole flock and cause great loss. 



Remedy. — Dress with corrosive sublimate, 1 part, com- 

 mon salt, 8 parts, water, 500 parts. Decoction of tobac- 

 co, 1 part, water, 40 parts. Stavesacre decoction — 1 part 



