514 DISEASES OF THE HORSE. 
diminished, if not entirely destroyed. The visible mucous membranes 
(as the conjunctiva), from which it received the name pinkeye, and 
the mouth, and the natural openings become of a deep saffron, ocher, 
or violet-red color. This latter is especially noticeable on the rim 
of the gums and is a condition not found in any other disease, so that 
it is an almost diagnostic symptom. In some outbreaks there is much 
more swelling of the lids and weeping from the eyes than in others. 
If the animal is bled at this period the blood is found more coagulable 
than normal, but at a later period it becomes of a dark color and less 
coagulable. There is great diminution or total loss of appetite, with 
an excessive thirst, but in many cases cold-blooded horses may retain 
a certain amount of appetite, eating slowly at hay, oats, or other 
feed. There is some irritation of the mucous membrane of the 
respiratory tract, as shown by discharge of mucus from the nose, and 
by cough. Pregnant mares are liable to abort. 
We have, following the fever, a tumefaction, or edema, of the sub- 
cutaneous tissues at the fetlocks, of the under surface of the belly, 
and of the sheath of the penis, which may be excessive. The infiltra- 
tion is noninflammatory in character and produces an insensibility 
of the skin like the excessive stocking which we see in debilitated 
animals after exposure to cold. In ordinary cases the temperature 
has reached its maximum of 105° or 106° F. in from 24 to 48 hours 
from the origin of the fever. It remains stationary for a period of 
from 3 to 4 days without so much variation between morning and 
evening temperature as we have in pneumonia or other serious 
diseases of the lungs. At the termination of the specific course of 
the disease, which is generally from 6 to 10 days, the fever abates, 
the swelling of the legs and under surface of belly diminishes, the ap- 
petite returns, the strength is rapidly regained, the mucous mem- 
branes lose their yellowish color, which they attain so rapidly at the 
commencement of the disease, and the animal convalesces promptly 
to its ordinary good condition and health, and rapidly regains the 
large amount of weight which it lost in the early part of the disease, 
a loss which frequently reaches 30, 50, or even 75 pounds each 24 
hours. For the first three days of the high temperature there is | 
a great tendency to constipation, which should be avoided if possible 
by the use of the means recommended below, for, if it has been 
marked, it may be followed by a troublesome diarrhea. 
Terminations —The terminations of simple influenza may be death 
by extreme fever, with failure of the heart’s action; from excessive 
coma, due generally to a rapid congestion of the brain; to the poison- 
ous effects of the débris of the disintegrated blood corpuscles and the 
toxin of the disease; to an asphyxia, following congestion of the 
lungs; or the disease terminates by subsidence of the fever, return of 
the appetite and nutritive functions of the organs, and rapid con- 
