PARASITES OF ANIMALS. : 107 
really unfit for food, though it is to be feared that farmers, as 
well as butchers, are not always over scrupulous in such cases. 
Symptoms. 
In severe cases any one at all familiar with sheep can 
readily detect the disease even by the general looks of the 
animal. They also show a peculiar weakness in the loins 
when the hand is pressed along the back over that region. 
In very bad cases the back becomes hollow and the belly 
hangs down, while the sheep become more and more 
emaciated and weak, dull, and dejected, with a feeble gait. 
The skin loses its natural color and becomes dry, while the 
wool is also harsh and dry, and comes off easily. 
The skin on the inner parts of the thigh, especially where it 
is naked, becomes dry or scaly early in the progress of the dis- 
ease. The eye affords very certain evidence, even at an early 
stage, so that even shepherd boys are able to select from a 
flock those that are diseased, by this symptom alone. If the 
lids be turned back and the membrane at the corner of the eye 
be pushed away, the conjunctiva and other parts will present 
an unnatural watery appearance, the vessels’ being swollen 
and filled with pale or yellowish colored blood. When the 
disease is farther advanced the blood-vessels lose their color 
and are scarcely distinguishable, though a few of them may 
be swollen and filled with dark, unhealthy looking blood. ~ 
Remedies. 
It can be safely stated that when these parasites have once 
entered the liver in considerable numbers there is no known 
specific remedy. All that can be done is to keep up the 
general health and strength of the animal until nature effects 
a cure, or until the parasites complete the natural course of 
their lives and voluntarily leave the sheep. To this end the 
afflicted animals should be removed to a dry pasture or good 
shelter, and be liberally fed with a variety of nutritious and 
palatable food, while they should be freely supplied with salt. 
This is another of those instances where prevention is far 
easier and better than cwre. From what we already know of 
the history of the pérasitey if-iy°eVident that sheep will be 
