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AUTOPSY.—The
body is somewhat emaciated. There is a complete absence of
swelling and œdema from the under-surface of the abdomen and extremities.
On Section.—All the tissues of the body are stained an orange colour.
On opening the Thorax.—The right pleural cavity contains two ounces of a turbid,
orange-coloured fluid, from which the hæmatozoon is found to be absent on microscopical
examination. The left pleural cavity is free from fluid. There are no pleural adhesions.
Lungs.—Both organs present a yellowish pink colour, but are free from sub-pleural
ecchymoses or any form of extravasation. The rigid lung on section presents a healthy
appearance. The anterior six inches of the apex of the left lung present a peculiar appear
ance. The pleura covering it is the seat of œdema and beneath it is found to be lying a
thin layer ⅛th inch in thickness of a yellow, transparent, jelly-like exudation. On section,
the tissues present a pinkish red colour, and are the seat of consolidation, the lobules being
individually separated and surrounded by a thin layer of the exudation varying from 1/12th
to ⅛th of an inch in thickness. The remaining portion of this organ presents a healthy
appearance, with this exception that the tissues, as before mentioned, are stained an orange
colour throughout.
There is no fluid in the pericardial cavity.
Heart weighs 4 lbs. 5 ozs.
External surface.—The base is the seat of fat. The surface of the muscular portion of
the organ is free from extravasations of blood.
On Section.—The right auricle contains some fluid blood; endocardial lining stained
an orange colour, but is free from sub-endocardial extravasations. The right ventricle ditto.
The left auricle and ventricle present a similar appearance.
The valves present a healthy appearance.
Abdominal Cavity—Is free from fluid.
Liver weighs 11 lbs. 7 ozs. There are signs of old peri-hepatitis of the right lobe ; the
left is free. There are numerous small yellow concretions visible beneath the capsule, and
on section the tissues are dark red in colour, friable, and the concretions are found to invade
the tissues generally.
Spleen.—Is more than twice the ordinary size and weighs 4 lbs. 6 ozs. There are a
few sub-capsular petechiæ of a red-brick colour on the surfaces of the organ, but more
especially on its rounded borders. On Section, the tissues are firm and present a normal
appearance.
Kidneys.—The right weighs 1 lb. 7 ozs; the left 1 lb. 3 ozs. The capsules strip easily,
but with the exception of a few injected veins at the most dependent parts of the organs,
the external cortical portion dœs not present any pathological change. On Section, the
Malpighian corpuscles are visible as red points and the rest of the tissues are more or
less stained of an orange colour.
Stomach—Is somewhat small and contracted. On section, there is a small quantity of
semi-digested food in its cavity. The cuticular portion presents a healthy appearance. The
villous portion along the line of demarcation is somewhat congested, but there is no sign of
ulceration or erosion of the mucous membrane. There are no ' spiroptera' tumors.
Intestines.—Small and large are deeply stained an orange colour, but present no patho
logical changes.
Bladder.—Healthy.
Brain.—The superficial veins are injected, but there are no petechiæ on the surface of
the hemispheres.
On Section.—The substance of the brain presents a healthy appearance, but the lateral
ventricles are somewhat distended with an opalescent fluid, in which on microscopical exami
nation the hæmatozoon could not be discovered.
No parasites of any kind were observed along the gastro-intestinal tract.
Remarks.—This animal, a Grey Herati Mare, aged 9 years, was purchased on 6th
March 1889, and until December 9th, 1892, on which date it was seen to be ailing, had,
during the three years and nine months it was working in the Bombay Tramway Company,
good health.
On admission.—The animal was in very good condition, and it was difficult to imagine
simply from looking at it that it was the subject of Surra. On examination, however, it was
found to have fever, extensive claret-coloured extravasations on the conjunctivae, and a