82
Remarks.—No parasites found in the blood of this mare 5½ days after she drank the surra
blood, but two days later they were found swarming in each drop. The outward symptoms
characteristic of surra appeared with the advent of the parasites. In this case, as in those
inoculated, there was first a depression and then an abnormal elevation of temperature, marking
the transition period from health to disease, which did not follow the introduction of the pint of
blood into the stomach so soon as it did the three drams under the skin.
Table showing variations in the pulse, temperature, and blood of case 6; disease transmitted by
drinking blood, 29th September 1880.
Date 1880.
Sept.
"
Oct.
"
29th
30th
1st
2nd
3rd
4th
5th
6th
7th
Morning or
Evening.
Evening...
Morning...
Do. ...
Do. ...
Do. ...
Do. ...
Do. ...
Do. ...
Do. ...
Pulse.
38
36
39
39
48
40
44
56
64
Temperature
of rectum.
100 3/5
98
100
101 1/5
100 4/5
99 4/5
102 1/5
108 2/5
103 1/5
Blood, &c.
Blood normal.
Do.
Not examined.
Do
Do.
Blood examined, no parasite found. Eyes
suffused.
Blood not examined.
Blood examined, parasites swarming. Mem-
branes very yellow. (Edema of legs.
Parasites as yesterday. Much oedema of the
legs. Petechiæ of the eyes and vagina. All
the symptoms of surra well marked.
APPENDIX G.
SURRA.
Case 7 —Experimental—by drinking affected blood.
Dun Mare, aged 9, Regimental No. 1823, of the 1st Punjab Cavalry.
September 3Oth, 1880—Morning —This mare was selected for experiment, like case 6, to know
whether the disease may be transmitted by the stomach. She is in good health, marched in with
the regiment a few days ago from Kabul, so she has not been exposed to the local influences
which are supposed by residents to lay the seeds of the disease in the horses during the hot
season to develop many weeks afterwards. She is to be cast for a severe lameness (ring-bone).
Her pulse 36, temperature 100. The blood is free from parasites and appears in all respects
normal. The mucous membranes are of normal color, having no shade of the yellow charac-
teristic of surra. Twenty-four ounces of blood was drawn from the jugular vein of case 4 and
administered as a draught without any delay. She coughed very little in taking it, but I think
about 4 ounces were lost, and full 20 ounces went into the stomach.
October 1st—Morning.—Pulse 36, temperature 99 2/5.
October 2nd—Morning.—Pulse 34, temperature 100 3/5.
October 3rd—Morning.—Pulse 35, temperature 100 2/5.
October 4th—Morning.—Pulse 35, temperature 99 3/5. Fed well until yesterday, when she
only took half her allowance of grain; all the visible mucous membranes are yellow, with
petechiae.
October 5th—Morning.—Pulse 39, temperature 100 3/5. Fed yesterday three-fourths allowance
of grain.
October 6th—Morning.—Pulse 59, temperature 103. Blood examined, many parasites
found, but not swarming as they first appeared in cases 5 and 6. They are very active, most
of them are more slender and transparent than usual in advanced cases. There is no oedema.
The visible mucous membranes are very yellow, with peteohiae well marked, especially the
vagina. Fed three-fourths allowance of grain yesterday. Thirsty.
October 7th—Morning.—Pulse 39, temperature 100 3/5. Refused grain yesterday, but ate all
the grass.