3
The recorded results from primary operations show case and insertion
success rates of 99.22 and 95.33 per cent. respectively, and it is gratifying
to find that with improved methods of storage under ice and of packing, the
success attained in the hottest months of the year was generally good. The
total cost of the Depôt for the year was Rs. 23,538-10-10 against Rs. 23,023-11-6
in the previous year, and the average cost of production works out at 5.4 pies
per dose. With the sanction of Government a special agent for the purchase of
calves was employed during the second half of the year. It is too soon to judge
of the results of this experiment, but it promises an improvement on the unsatis-
factory system of contracting.
During the year, 979 cow calves were received into the Depôt, of which 868
were vaccinated and the lymph of 666 or 76.7 per cent. was judged suitable for
use. A trial was made of buffalo calves, the yield of pulp from which is greater
than in the case of cow calves; but there are circumstances connected with the
use of buffalo calves for the production of vaccine which require further investi-
gation before these animals can be brought into general use.
The wastage among calves—32 per cent. during the year—adds considerably
to the cost of lymph production. Rejections for unfitness or after epizootic
disease, and unsuccessful vaccination, are the chief causes of this wastage. A
larger market for the purchase of calves, allowing of greater freedom in selection,
would materially reduce the number of the rejected, while any investigations
undertaken with the object of preventing epizootic disease amongst cattle, and
more especially piroplasmosis, would be productive of good not only to the
Vaccine Depôt but to the whole of the agricultural community.
Major F. H. G. Hutchinson, I. M. S., Deputy Sanitary Commissioner,
Southern Registration District, was deputed to Aden in February 1910 to enquire
into the causes of failure of Belgaum lymph. He was able to show that if the
ordinary precautions are taken with regard to storage and use of the lymph, such
as are practised by vaccinators in the Presidency, equally good results can be
obtained.
Results of lymph.
14. The following table shows the different kinds of lymph used, the
work done with each kind and the comparative results
obtained:—
Districts.
Western Registration District ...
Presidency Circle
...
...
...
Central Registration District
...
Southern Registration District ...
Gujarát Registration District
...
Sind Registration District ...
Kind of Lymph need.
Human ...
Glycerinated ...
Animal ...
Glycerinated
...
Human ...
Glycerinated ...
Human ...
Animal
...
Glycerinated ...
Human
...
Glycerinated ...
Human
...
Animal ...
Glycerinated ...
Number of
operations.
Primary.
186
124,350
5,928
14,048
4,871
151,976
18,040
4,174
120,992
29,528
93,428
77,290
6,069
2,287
Re-vac¬
citation.
27
11,326
3,362
6,999
58
4,416
734
154
13,615
1,340
3,715
1,497
860
364
Successful cases exclud-
ing " unknown."
Primary.
168
113,817
5,400
12,635
4,629
138,948
18,017
4,121
115,207
29,123
87,778
69,310
5,861
1,833
Re-vac¬
cination.
23
6,462
34
71
45
2,089
532
141
7,329
980
1,671
967
292
200
Percentage
excluding "
of success
unknown."
Primary.
100.00
98.72
99.15
97.35
99.33
99.74
99.96
98.87
99.28
99.07
99.01
0871
99.64
93.38
Re-vac-
cination.
100.00
74.73
31.78
24.83
95.74
71.54
74.82
91.56
70.82
73.85
59.53
88.96
73.55
70.92
Inoculation.
15. No inoculation was reported to have been
practised anywhere in the Presidency.
Ill-effects by vaccination.
16. No instances were reported of any disease
having been communicated through vaccination.
17. The table showing the number of vaccinations performed in Municipal
towns on children under one year of age is given in Appendix III.
T. E. DYSON, M.B., D.P.H.,
Lieut.-Colonel, I.M.S.,
Sanitary Commissioner.