GEORGE MtfLLER. 
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The erythematous dermatitis caused in this way is seen not 
only in sheep, but is occasionally seen in white pigs and on un- 
pigmented spots of skin of horses and cattle. 
It is generally localized on the head and is accompanied with 
considerable itching. There are sometimes congestive conditions 
of the respiratory mucous membranes, and even of the brain. 
It is peculiar that the disease does not appear in white animals 
with black streaks, nor in animals kept in stalls, nor in animals 
that are only turned out to grass in dull weather; and that it dis¬ 
appears at once as soon as the diseased animal is brought into a 
dark place. A more or less obstinate desquamation of the 
cuticle remains after the disease is gone. 
Treatment is indicated by what has already been said. 
3.—Eczema. 
Eczema in the domestic animals may be acute or chronic, and 
passes through the same stages as does the disease in the human 
subject. 
There is a hypersemia of the skin, with serous infiltration of 
the individual papillse and emigration of white corpuscles into 
them. This forms the stadium papulosum. The exudation in¬ 
creases in the papillae; the corneus layer is separated from the 
rete malphigi and we get the stadium vesiculosum. If the Cornells 
layer is strong enough to resist the exudation for a time, the con¬ 
tents of the vesicles become milky, and eventually purulent, in 
consequence of leucocytic emigration. 
In other cases the vesicles break, the skin is diffusely red¬ 
dened over larger or smaller areas, at the site of each vesicle 
there is a loss of the epidermis, and the exudation trickles freely 
over the surface. This is the stadium madidans. The exuding 
fluid soon dries up into crusts and scabs, the color and consistency 
of which vary with the quantity of cellular elements they contain. 
We then have the stadium crustosum sive impetiginosum. After 
the efflorescence has disappeared, there persists for a time an 
over-production of epidermis, causing a loose scaliness of the sur¬ 
face. This is called the stadium squamosum. 
It is rare, however, to observe this schematic course of the 
disease in its entirety. The hairy covering and the pigmentation 
