12. Urine-Two thousand one hundred and eighty-seven specimens were cultured for pathogenic organisms.
13. Urethral and cervical smears-three hundred and forty-one smears were examined for the presence of the gonococcus, with forty-one positive findings.
14. Nasal smears, etc, for M. lepræ-Three hundred and fifty-eight examinations gave seventy-five positive results.
15. Throat swabs--Four thousand two hundred and ten throat swabs were cultured for C. diphtheria; and two hundred and twenty-two were examined for the presence of hemolytic strepticocci, with six positives recorded.
TABLE IX.
Examination of Throat Swabs for Diphtheria.
Positive
Negative
Grand Total
Chinese
Non-Chinese
Total
586
9.314
B
303
593
3,617
3,899
4.210
311
16. Cerebrospinal fluid-Nine hundred and fifty specimens were examined for the presence of pathogenic organisma.
TABLE X.
(6) Clinical Pathological Procedures,
18. Urine examinations-Thirteen thousand one hundred and thirty- seven routine and miscropic examinations of urine were carried out.
19. Pregnancy tests-Friedman teats on rabbits dropped to forty-six, whilst frog tests, using the male Rana rugulosa, which is readily available locally, numbered four hundred and twenty-seven.
20. Miscellaneous tests-Five hundred and seventy-seven examina- tions of an unclassified nature were carried out.
(7) Preparation of Vaccine Lymph.
21. Both supply and quality of the buffalo calves used for lymph production were satisfactory, but conditions under which this work is carried out continued to be primitive by modern standards, necessitating the use of umbrellas during inclement weather.
(8) Preparation of Vaccines,
22. Rather less cholera vaccine was prepared this year, but it was thought advisable to make thirty-four litres of plague vaccine. The 100 cu. ft. refrigerator, acquired last year, has been out of commission for the past several months.
23. Rinderpest vaccine, prepared from a lapinised strain, was produced throughout the year for the benefit of the Agricultural Depart- ment.
24. Antirabic vaccine-a new strain of fixed virus was obtained and used. Fortunately the 1949 outbreak of rabies appeared to be dying out during the second half of the year.
Examination of Cerebrospinal Fluid for Pathogenic Organisms.
Moningococcus
Pneumococcus
M. tuberculosis
Negative
Grand Total
Chinese
Non-Chinese
Total
5
tn
16
16
9
901
16
920
934
18
950
17. Rat spleen smears-Fifteen thousand six hundred and four examinations were made of smears for P. pestis, with no positive findings.
134
Chineso
Non-Chinese
TABLE XI.
Cases Treated with Antirabic Vaccine.
Treatment completed
Treatment not completed
Total
1,570
2,142
132
182
3,718
314
Grand total
1,708
2,321
4,032
!
135