8
pitted appearance which some people maintain as the test of a good scar and efficient
protection.
In compliance with the instructions contained in your letter No. 720 R., of April
19th, 1899, I commenced some experiments in September last year with a view to ascertain
the degree of protection conferred by vaccination with vaseline vaccine paste. I had
intended to complete these experiments during the past cold weather, but my having
been ordered on plague duty almost immediately on return from leave has prevented my
doing so. I should have preferred to complete the investigation before making any report on
them ; but in compliance with the directions of His Honor the Lieutenant-Governor, forward-
ed with your letter above quoted, I am including in this report the results of such experi-
ments as I have made. Taking the production of unmodified vesicles by a second vaccina-
tion in children primarily vaccinated one year previously as a test of the efficacy of the
primary vaccination, I re-vaccinated on September 12th, 1899, 25 children who had been
previously vaccinated with vaseline vaccine paste on September 16th, 1898, using for dif-
ferent children human and buffalo lymph and vaseline vaccine paste.
Three insertions were
made in each case. I inspected the children on 17th and 18th September 1899 when
three were absent, and are excluded from consideration. The results are shown in the
subjoined table and may be thus epitomised. Of the 22 children inspected 13 showed no
results whatever, two showed doubtful marks, three showed modified marks, and four
unmodified marks. All the children were carefully examined before being re-vaccinated
and the results of the primary vaccination noted. Of the four children in whom re-vac-
cination produced unmodified marks, two had well pitted primary scars and two had
scars only slightly pitted.
The percentage of success judging by the ordinary vaccination standard amounted to
17.39. The insertion success was only 14.49. Three of the “successful“ results were
obtained by human and one by buffalo lymph. In the absence of similar experiments
with human, buffalo or other lymphs the experiment here described furnishes- no definite
conclusion as to the value of vaseline vaccine paste compared with these lymphs.
Table showing results of re-vaccination of children one year after they had been
vaccinated with vaseline vaccine paste. The children were vaccinated with vaseline
vaccine paste on September 16th, 1898, and were re-vaccinated, each with three insertions,
with the different lymphs shown below on September 12th, 1899, and were inspected by
the Deputy Sanitary Commissioner on September 17th and 18th, 1899" :—
Serial No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Sex.
F.
F.
M.
M.
F.
F.
F.
M.
M.
M.
M.
F.
M.
M.
M.
M.
F.
M.
F.
M.
F.
F.
F.
M.
M.
Age in years on date of
primary vaccination.
2
2½
1¾
2½
2
2½
2
2
1½
1¼
1½
3
2
2
2
3
2
1½
2½
2½
1½
1¼
1
1½
1
Caste.
Dhund
Teli
Do.
Dhund
Do.
Do.
Do.
Darzi
Gujar
Dhund
Do.
Do.
Do.
Darzi
Mochi
Dhund
Brahmín
Dhund
Do.
Do:
Do.
Do.
Do.
Do.
Joláha
Results of primary vaccination.
Very good, six marks
Faint, but well pitted, 6 marks
Ditto
ditto
Faint, well pitted, 5 marks
Very good, large pitted, 6 marks
Very well pitted, 5 marks
Good, fairly pitted, 6 marks
Good, 2 marks
Large, very well pitted, 6 marks
One well pitted,
remainder
slightly.
4 good, well pitted
4
ditto
4
ditto
5
ditto
6
ditto
6
ditto
6
ditto
6 good, large well pitted
Fairly pitted,
6 marks
Good, well pitted, 6 do.
Ditto
6 do.
Ditto
5 do.
Ditto
6 do.
Ditto
4 do.
Somewhat good, well pitted, 3
marks.
Kind of lymph
used for re-vacci-
nation.
Buffalo lymph.
Buffalo vacci¬
nated
with
human lymph
on 9th Septem-
ber 1899.
Vaccinated
from a
boy
aged 8 months
who was vacci¬
nated
with
vaseline
tube
No.1079 on 6th
Sept. 1899.
Vaccinated
from a girl who
was vaccinated
with
vaseline
vaccine
paste
tube No. 1079
on 6th Septem¬
ber 1899.
Vaseline
vac¬
cine paste, tube
No. 1007 of 29th
August 1899.
Result.
Unsuccessful.
1 doubtful.
Unsuccessful.
Ditto.
Ditto.
Ditto.
...
Unsuccessful.
...
2
Unsuccessful.
2 very slight.
2 slight.
Unsuccessful.
2 doubtful.
2
Unsuccessful.
3
3
...
Unsuccessful.
Ditto.
Ditto.
2 slight.
Unsuccessful.
Remarks.
Absent
Do.
"Modified"
Do.
Absent.
“Modified"