54 PARASITOLOGY. 
SARCOPTES SCABEI, variety Caprae (Capra—geat). 
History.—The sarcoptic form of scabies in goats 
has been reported at different times; rare in this 
country. 
Animal Intested.—The goat. 
Condition Produced; Symptoms.—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. 
SaRcopres MuTANS; variety Gallinae(Gallus—a cock). 
History.—Widely distributed. 
Animals Infested. —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 ina 
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. 
