cxciii
Lungs.—Are pale and dotted over with extravasations and also with a few raised lumps
lying under the the visceral pleurae, which on examination are found to be irregular shaped
calcareous bodies, yellow in colour. The right apex is the seat of emphysema; the rest of
the lung being well filled with air. On section and pressure some yellow blood-stained
frothy fluid exudes from the cut surfaces. The left apex is also the seat of localized
emphysema, the base and above it for some ten inches is solid, and the pleura covering it,
is opaque and thickened, yellowish in colour, but there are no adhesions. On section, the
lobules are well defined, the intervals between the lobules being occupied with yellow-
coloured exudation; while the lung tissue presents a variegated appearance, some groups
of lobules being the colour of raw beef, whist others are of an orange colour.
Heart.—Weighs 4 lbs. 14 ozs. There is a little orange-coloured fluid in the cavity of
the pericardium. The base of the organ is the seat of much yellow-coloured exudation
occupying the position of fat which is usually observed; the appearance reminds one of dark
brown-coloured solidified gelatine covered by the transparent glistening layer of the
visceral pericardium. This gelatinous exudation accompanies the coronary vessels from the
base to the apex and presents a broad strip ¾th inch in width and ¼th to ½ inch in
depth, dotted over here and there with petechias.
The Right auricle.—Is distended with blood and numerous extravasations are dotted
over the surface of the muscular tissue, both anteriorly and posteriorly, lying under the
visceral pericardium.
The Might ventricle.—Presents two large extravasations, one lying beneath the right
auricle just below the auriculo-ventricular groove, and a second one 1.5×1 inch, lying to
the right of the inter-ventricular groove.
The Left auricle.—Presents a few small extravasations dotted over its surfaces.
The Left ventricle.—Presents numerous and extensive extravasations, especially at its
upper part, and extending towards the apex for nearly an inch in extent. These are
present anteriorly and posteriorly. On section, the Right auricle presents a few extravasa-
tions lying under the endocardial lining. The Might ventricle also presents a few sub-endo-
cardial extravasations. The valves are healthy and are not petechiated. The Left auricle
presents a few sub-endocardial extravasations. The Left ventricle presents very extensive
extravasations especially those involving the musculi papillares, colouring them almost
black. The valves are healthy.
Stomach.—Small.
On section, it contains some semi-digested food. The cuticular por-
tion of lining membrane is healthy. The villous coat is pale and healthy, with the exception
of a small tumour (Spiroptera Megastoma), the size of a small walnut, which lies beneath the
mucous membrane and so raises the villous coat above the ordinary level of the tissues.
On section, this is found to be a clot of blood lying in a small cavity.
Liver.—"Weighs 11 lbs. 2 ozs. There are signs of old perihepatitis on the convex
surface of the organ, also numerous round patches on the surface of the capsule of an
opalescent hue, and a few yellow calcareous bodies are seen lying beneath the capsule. On
section, the tissue presents a brownish colour, the individual lobules stand out very dis-
tinctly and a few yellow calcareous bodies are found to pervade the tissues.
Spleen.—Weighs 3 lbs. 5 ozs. The capsule is dotted over with small irregular shaped
extravasations. On section, the tissue is firm and healthy.
Kidneys.—Eight 1 lb. 5 ozs. Left 1 lb. 6½ ozs. The capsules strip easily, revealing
very pale tissue beneath, with the stellate veins injected. On section, the cortical and
medullary portions are pale but there are no extravasations.
Brain.-— The superficial veins are congested, and the convolutions somewhat flattened.
The lateral ventricles contain 2½ to 3 ounces of clear fluid and the Iter a tertio, &c, will
allow of a penholder 1/5th of an inch in diameter, to be passed into it.
The points of interest in this case are:—
(i). That this horse was successfully inoculated with fluid containing ha3matozoa from
the tunica vaginalis testis of a Goat.
(ii). The period of incubation in this case, from the inoculation to the appearance of
hæmatozoon in the blood, was 5 days.
(iii). The well marked Urticarial eruption which appeared two days after the appearand
of the hæmatozoon in the general circulation and persisted for twelve hours and
then commenced to fade.
(iv). The period elapsing between the inoculation and the death of the animal was
twenty-two days.
(v). The extensive pathological lesions presented by the heart both externally and
on section.
B 1086—49 ap