268 
COLEMAN NOCKOLDS. 
when' involved, show the changes peculiar to the disease pres¬ 
ent of lobar pneumonia, congestion of the lung capillaries, 
which causes the lung to look redder, and it is larger than 
usual. On section, blood serum and froth exude. The whole 
organ resembles a spleen ; it is not as spongy and elastic as 
usual, but it still floats in water if the disease has not advanced 
beyond the congestive stage. When red hepatization has taken 
place, the spongy character of the lung is gone *, it is hard 
and solid, resembling liver ; the vesicles are filled with fibrin, 
albumen or lymph, which has coagulated. The lung sinks in 
water and is friable. If grey hepatization has occurred the 
lung contains cavities of pus ; upon pressure pus exudes at dif¬ 
ferent points; it is paler and sinks in water. 
Often the pleura is involved ; it is thickened and injected, 
and lymph or pus adheres to it. The lung in lobular pneu¬ 
monia if cut into shows the lobules as ill-defined reddish-grey 
nodules ; bloody fluid can be squeezed out, and the surface of 
the lung is smooth instead of granular. 
In the intestines the changes are swelling of the mucous 
membrane, which is more or less ecchymotic. Often there are 
necrotic patches present. The submucosa is infiltrated with 
liquid, giving rise to oedema. Often there is ulceration present, 
especially in the neighborhood of the ilio-caecal valve. Peyer’s 
patches are involved, contents of bowels bloody. 
The brain is cedematous and the vessels of brain engorged ; 
lymphatics hypersemic. The myocardium is of a greyish faded 
leaf color, due to the fatty change which has occurred. The 
liver, kidney, and other parenchymatous organs have under¬ 
gone either cloudy swelling or fatty degeneration, according to 
the length or severity of the fever which existed. Bed sores 
are present upon the elbows, thighs, hips, and other promi¬ 
nent parts, due to constantly lying down and lowered nervous 
function. 
Treatment .—Prophylaxis : Distemper is a disease that can¬ 
not be prevented ; it attacks subjects under all conditions, but 
the spreading of it may be stopped to a certain extent by isola- 
