244 Diseases of the Skin. 
also recommend care in its selection, as some of these 
appliances are perfect tortures, fitting badly and inflict- 
ing pain on the suffering creature. Jor various forms of 
mange dressings see Chapter VIII. under Parasiticides. 
Follicular Mange differs from Sarcoptic Mange both 
in respect of the parasite and its location. The former 
is the analogue if not the identical parasite Demodex 
folliculorum common to mankind ; indeed, this form of 
human itch has been transferred to the dog, and back 
again to mankind. The location of the parasite is the 
bag or pouch-like sebaceous glands and hair follicles ; it 
is microscopical, possesses a large abdomen, several pairs 
of short legs, elongated after the form of a shrimp, and is 
endowed with remarkable powers of multiplication. The 
disease produced is much less susceptible of medical 
treatment, and there is also at first much less irritation 
and resulting fever. It appears in patches, first about 
the head, face, lips, &c., and later it invades the legs, 
loins, belly, sides, and scrotum in the male. The dis; 
charge from the sebaceous glands partakes of pus as well 
as the excess of a morbid secretion, by reason of which 
the sufferer presents a loathsome appearance and highly 
offensive odour. The animal shakes himself instead of 
using his feet, and he refuses to be handled. When the 
hairs are plucked singly from the follicles, the parasite 
may be detected at the root by means of a microscope; 
the pus and also the secretion from the gland likewise 
furnish the same conclusive evidence. The first signs of 
the malady consist of small bare patches, on which 
appear red spots, which proved to be the enlarged ducts 
of the sebaceous glands, filled with serum, and later, with 
pus. These subsequently burst and form scales, and 
occasionally one or more pustules become confluent, or 
united, especially when the skin is acutely inflamed ; the 
hair is also freely shed over the entire body, and the 
animal suffers much from cold, requiring ample clothing, 
especially in adverse seasons, Further aggravation arises 
from the formation of sores and cracks, the result of death 
of the tissues of the skin, blood and pus flowing freely 
from the discharging surfaces. 
