54 PARASITOLOGY. 



Sarcoptes Scabei , variety Caprae (Capra — g©at) . 



History. — The sarcoptic form of scabies in goats 

 has been reported at different times ; rare in this 

 country. 



Aftimal Infested. — The goat. 



Conditio7i Produced : Syjitptoms. — It usually attacks 

 the head and neck first, then spreads to the body, 

 and finally, if not treated, the whole body and limbs 

 will be affected, as in the dog. It causes intense 

 itching, scabs pile up, and the hair falls out, reveal- 

 ing the scabby patches. 



Sarcoptes Mutans ; variety Gallinae(Gallus — a cock). 



History. — Widely distributed. 



Ajiimals hifested. — Fowls, on the legs. 



Description. — The acarus is much smaller than the 

 species producing scabies in the large animals. It 

 is round in shape and its legs are short, giving it a 

 stubby appearance. See Fig. 16. 



Condition Produced. — The condition produced by 

 these parasites is called scaly leg. They live under 

 the scales, especially on the anterior part of the tarsi. 

 The irritation produced by its punctures results in a 

 scabby or scaly condition of the legs by much the 

 same process as in scabies of the large animals. The 

 minute scabs accumulate under the scales, displacing 

 them and producing a lumpy, scaly condition, the 

 crust becoming porous and honey combed. The par- 

 asites can be found in the serum between the scab 

 and the leg, appearing as minute white specks. 



