M 71
Brought forward,.......
Microscopical examination for malaria parasites and
differential count of
1,201
??
15
>>
+
12
""
""
"}
**
-
21
leucocytes,
>>
53
plague,
gonococcus,...
bacillus of leprosy, spermatozoa,
>>
filaria,
of sputum for tubercle
""
"}
"
""
>>
bacillus, pneumococci,
83
18
4
4
2
1
130
11
streptococci,... 10
pus for organisms,
stool for eggs,
*
amaba,
3
34
7
urine for tubercle bacillus, 4
pus cells,
...
...
"
"
**
}
blood, cast,
9
...
12
dog's brain for rabies,
3
Bacteriological examination of water,
Preparation of vaccine,
Wassermann's reaction,
Medico-legal examination of clothing, knives, etc., for
72
...
...
2
136
blood,
Miscellaneous,
9
30
...
Total,
1,791
EXAMINATION OF RATS.
The results are given in Table I. The total number of rats examined was 73,008 as compared with 85,402 in 1918. 242 were found to be plague-infected (186 in 1918).
BACTERIOLOGICAL EXAMINATION OF WATER.
The three chief water supplies of the Colony (Kowloon, Tytam, and Pokfulum) were examined quarterly and the results are given in Tables II, III, and IV.
In every case the sample was taken at its source, i.e., either directly before or directly after filtration.
The methods used in carrying out the examinations were the same as those described in Dr. Macfarlane's "Report on an Investigation of the Pokfulum Water Supply" (No. 20 of 1911).