7
REPORT ON THE WORKING OF THE KING INSTITUTE, GUINDY
91.7 per cent. The best results have been attained in the following
districts:—The Nilgiris tops the list with a success rate of 99.8. Chittoor
stands next with a rate of 99.2, Madras Corporation shows 99 per cent and
Malabar 98.9 per cent.
The total insertion success rate during the year is 90.1 as compared
with 78.0 in the year previous. The improvement is most conspicuous as
is well seen in chart No. II. As regards this rate of insertion success,
Chittoor district stands first with a rate of 96.9 per cent, Madras Corpora
-tion comes second with 95.3 per cent, Malabar stands third with 94.7
per cent and Chingleput fourth with 94.4 per cent. There is still room for
considerable improvement in some of the districts. With an effective
lymph, if one insertion "takes" there is no reason why all the other
insertions should not take also. The greatest care in operating is required
if the best results are to be obtained.
(d)
Revaccinations .—Statements 6 and 7 show the results obtained
with revaccinations during the year arranged according to months and
districts. There has been a considerable increase in the number of
revaccinations performed during the year as compared with those done
the year previous. The success rate 45.3 and the insertion success rate
32.1 also show great improvement when compared with the rates for
1923-24, viz., 42.5 and 27.5 per cent, respectively. (Vide charts Nos. III
and IV.)
(e)
Work done by the Institute in the Saidapet range .—The Institute
staff has once more had the advantage of utilizing this vaccination range
for the purpose of testing the lymphs, the range being placed at the
disposal of the Director of the Institute for the period of another year.
It is of the utmost importance that the Institute should have this range
permanently at its disposal, as a test range, with the necessary vacci
-nation staff under the control of the Director, and on the cadre of the
Institute.
The work done in the Saidapet range may be considered under the
following headings:
—
(1) The testing of different batches of stock lymphs before issue to
the Presidency.
(2) The testing of batches or lymphs purified by various methods.
(3) The testing of experimental lymphs prepared in various ways.
(1)
Tests with batches of stock lymphs before issue .—Every batch of
stock lymph was tested in Saidapet range before it was issued to the
Presidency. The total number of cases vaccinated was 5.670. The results
were as follows:—
Case success rate . . .
99.4 per cent.
Insertion success rate . . .
98.2
"
It is perfectly evident from these results that the potency of the
lymph now issued from the Institute is very high and the work of the
vaccinators in this range, under proper supervision, excellent. These
figures compare most favourably with those obtained with the lymph
manufactured in the Government lymph establishment under the Ministry
of Health, England, whose report showed 98.5 per cent case success and 94.7
insertion success during the year 1923. If the case success and insertion
success rates obtained in the Saidapet range are as above, there is
no reason why similar rates should not be obtainable in the other districts
of the Presidency, with stricter supervision on the part of the District
Health Officers over the work of the vaccinators.
(2)
Experiments in lymph purification.—Experiments with a view to
the purification of vaccine lymph and removal of the extraneous organisms
which are invariably present as the result of the methods used for the growth
of the virus and the collection of the lymph, have been in progress in this