6
REPORT ON THE WORKING OF THE KING INSTUTE, GUINDY
Primary vaccinations.—Statement No. 4 (see chart I) gives the results
obtained for primary vaccinations month by month throughout the year. The
results obtained with the two types of lymph are given separately and the case
and the insertion success rates are given for both. The influence of the increased
number of operations performed with glycerine lymph has made itself felt in. the
combined success rate which has risen from 78-76 (last year's rate) to 81-0 in the,
year under report. The combined insertion success rate is 56 .4 as opposed to 50-5
the rate for the preceding year. The success rates for lanoline and glycerine
lymphs taken separately are as follows :—
. . .
Case.
Insertion.
6 6 .
Lanoline
...
...
...
...
77.1
48.4
Glycerine ...
...
l ..
. ..
. 6.
89.7
73.6
These rates are almost identical with those obtained last year and simply
bear out the conclusions already expressed with regard to the relative merits of
these two types of lymph. These figures once more show the desirability of dis-
continuing the routine issue of lanoline lymph as soon as possible in favour of
glycerinated lymph.
Chart I shows the monthly success and insertion success rates with the two
types of lymphs. Apart from the fact that the deleterious effect of the hot
weather upon the vaccination results is somewhat more marked than it was last
year, especially in case of the lanoline lymph and in both insertion success rates,
the chart shows nothing new. It again illustrates the necessity for cutting down
the number of vaccination operations performed during the hot months to a
minimum. This principle has not, however, been acted upon this year to the same
extent as last year in spite of the fact that more lymph was issued during the
present cold season. The number of vaccinations performed during the six hot
months and the six cold months for the past two years is as follows :—
Total primary
Year.
vaccinations.
Total returns
from April to
September.
Total returns
from October
to March,
Proportion of
column 8 to
column 4.
( 1)
_ (2)
(3)
(4)
(5)
1921-22
...
..,
...
...
...
1,084,352
364,497
719,855
1: 1'97
1922-23
...
SOI
...
...
...
953,708
812,153
611,555
1: r78
The returns for the hot months for the year 1921-22 are greater than those
for 1922-23 by about 20,000, whereas the returns for the cold weather months
during the year under report, owing to an unexplained diminution during
February and March, are no less than 100,000 less than those of the previous
year. The proportion of vaccinations performed during the hot months has
therefore sensibly increased in the present year. This is not as it should be.
District authorities should be impressed with the necessity and value of reducing
the hot weather operations to the minimum compatible with safety. On the
other hand they should take steps to intensify the vaccination campaign carried
out during the cold weather months so as to increase the proportion of the
population successfully protected by vaccination to the greatest extent possible.
Statement No. 5 (chart II) shows the success rates for primary vaccinations
obtained by the different districts. The chart shows the case success rates only.
The insertion succe s s rates are given in the statement above. Here again the
conclusions to be drawn from an examination of the results show little that
is new.
The resultsobtained with glycerine lymph are without exception superior
to those obtained with lanoline lymph, Thirteen out of the 25 districts have
returned a case success rate of over 90 per cent with glycerine lymph. Four of
these the Nilgiris (99 . 2), Madras Corporation (96 . 3), North Arcot (95. 6) and
Chittoor (95 . 0) give a rate of 95 per cent or over. Special attention is directed
to the rate recorded by the Nilgiris which shows the results obtainable with. the