xcii
Lungs.—The surface of the right is clotted over with sub-pleural petechiæ of a bright
red colour, and there is a localized emphysema at the apex and along the anterior and infe
rior borders. On section, blood flows from the cut surfaces, and the tissues present healthy
appearance. The left lung presents the same pathological changes as those found in the
right, but there are in addition on the superior aspect and close to the surface-involving the
posterior ⅓rd of the organ two patches of consolidation separated from each other by two
inches of healthy lung tissue. On section the one was found to measure 1.5" × .75" × .5", the
other 3" ×2"× 1.25". The tissues in each case presented a dark-red colour and no inter
lobular exudation was present. The cavity of the pericardium contains two ounces of a
turbid, somewhat viscid, orange-coloured fluid, but no hætnatozoa were found in it on micros
copical examination.
Heart is considerably hypertrophied and weighs 7 lbs. There is a total absence of exu
dation round the base of the organ. The external surfaces of the ventricles are dotted over
with numerous, small, dark-coloured sub-pericardial ecchymoses, and there is in addition an
extensive extravasation, somewhat circular in shape and one inch in diameter, It is dark
in colour and involves the wall of the right ventricle, but is surrounded by a much lighter
coloured zone. On section, the Right auricle contains some dark-coloured clot, and there
are a few sub-endocardial extravasations dark in colour. The Right ventricle is pale in colour
and contains two small circular ecchymoses. The Left auricle presents a healthy appearance.
The lining membrane of the Left ventricle is stained a yellowish colour, dotted over with
bright red ecchymoses and several more extensive extravasations, which involve the musouli-
papillares for the most part.
The abdominal cavity contains two ounces of a clear straw-coloured fluid,
Liver is fairly normal in size, weighs 12 lbs. 8 ozs, There are a few sub-capsular
petechiæ scattered over the surfaces of both lobes and a few small calcareous nodules, On
section the tissues present a healthy appearance.
Spleen is normal in size. There are numerous sub-capsular petechiæ of a brick-red
colour. On section the tissues are firm and present a healthy appearance.
Kidneys.—The left weighs 2 lbs. 1 oz., the right 2 lbs. 5 ozs. The capsules strip
easily, and present organs thickly dotted over with minute petechiæ. On section the cortical
portions present numerpus small red petechiæ. The medullary portions are free.
Stomach is somewhat distended. On section the organ is found to contain semi-digested
food. The cuticular portion presents a perfectly healthy appearance. The villous portion
is stained a pale greenish colour dotted over with large numbers of bright-red coloured
ecchymoses lying under the mucous coat. These small extravasations are individually dis
tinct and are for the most part circular in form, with a diameter varying from 1/16th to 1/8th
inch, There appears to be superficial erosion of the mucous lining of the organ in places,
but there is no sign of congestion at their edges.
Small Intestines.—One small extravasation is present at the commencement of the
duodenum otherwise the jejunum and ileum are free from pathological changes.
Large Intestines present a healthy appearance.
Remarks.—This animal, an Australian Bay Mare, aged 11 years, was purchased by the
Bombay Tramway Company on 22nd November 1886. It had very good health during
six years which elapsed between the date of landing in India, but was attacked with
Surra on the 10th December 1892.
On admission into the Laboratory Hospital the symptoms of the disease were fairly
well marked, but in addition to the fact that the extremities were the seat of some swell
ing and oedema at such an early date, a symptom was present not previously observed in
the other cases which have come under our notice, viz., the presence of two folds of skin
one on each side running from between the fore-limbs to points several inches behind the
shoulders. These folds were the seats of considerable deposits of jelly-like exudation.
The temperature on the morning of the 5th December registered 38.8°C. and remain-
ed at the same degree on that date.
On the following morning it had fallen to 87.2°C. From this latter date until the even
ing of the 9th it remained within normal limits and was then 37.7°C. But on the morn¬
ing of the 10th, the temperature had become elevated and was 39.4°C. On examination of
the blood the hæmatozoon was discovered. At mid-day on the 11th organisms were very
numerous in the blood and the temperature attained a maximum of 40.6°C, On the evening
of that day an Arsenical treatment having been decided upon, the animal received the first
dose, grs. iv, and by the morning of the 16th, the temperature had again fallen to 37.6°C,
after which date until the evening of the 17th January 1893, a period of thirty-four days
the temperature never reached 39°C. On this date an abscess formed over the left eye and
from the 18th to the morning of the 22nd, the temperature oscillated between 37.4°C. and
40.1°C, but immediately fell after the evacuation of the pus on the latter date, and during
the next three days the morning and evening records scarcely varied more than half a
degree Centigrade, when death took place at 7.45 A.M. on the 25th January. Arsenic was
administered for 45 days and the blood remained free from the hæmatozoon during 44 days,
at the expiration of which period death occurred.