X1000307-1950-51_Part02 — Page 31

(4) Serology.

7. The Kahn reaction-Fifty-five thousand three hundred and one sera were tested. This represents an increase of 36% on last year's figures and was due chiefly to the test being carried out on all maternity cases and on all newly sentenced prisoners, a measure which was intro- duced towards the end of the year. For the antenatal cases and for cord blood, the Berger-Kahn modification was performed.

TABLE V.

Examination of Blood Sera for Syphilis.

(5)

Bacteriological Examinations.

9. Blood clot culture-Bact. typhosum was isolated from the Widal clot in one thousand and seventy-eight instances, paratyphoid A sixteen times, and paratyphoid C once. This remains a useful supplementary procedure to blood and bone marrow culture for the enteric group of organisms.

10. Feces-Three thousand three hundred and ninety-four stools were cultured for pathogenic organisms. No case of cholera has been discovered since 1947.

Chinese

Non-Chinese

Total

Mala

Female

Male

Female

TABLE VIL.

Examination of Stool for Organishis.

Chinese

Non-Chinese

Strong Positive

1.311

1.399

1

2,712

Total

Positive Negative

Positive Negative

Positive ...******undik

1,880

2,161

1

4,042

Bact, typhosp

87

2,217

BI

2,285

Weak Positive

1,706

1,751

想

3,461

TY

Doubtful

1,476

1.770

ག

3,253

B. dysenteriae

Negative

11,151

30,504

05

41.939

(Group)

5

428

3

Cytology typical of

hacillary dysentery.

32

27

11

*

Grand Total

17.524

$7.596

87

105

55,301

B. dysentery

(Flexner)

107

16

B. dysentery (Shiga).

Salmonella group

139

V. cholera

Grand Total

374

21

2,909

19

636

76

129

189

6

26

92

8,894

8. Agglutination tests-Two thousand four hundred and fifty-eight sera were examined for the presence of agglutinina against various organisms. It appears that paratyphoid A infection is much commoner than paratyphoid B, and that paratyphoid C is found in the Colony occasionally. Only one case gave a positive Weil-Felix reaction.

TABLE VI.

Agglutination Tests.

Chinese

Non-Chinese

Pos. Negative | Doubtful Fos. | Negative | Doubtful

11. Sputum-Thirteen thousand eight hundred and forty-eight sputa were examined for the presence of the tubercle bacillus. In addition gastric lavage from 144 patients gave 11 positive results.

TABLE VIII.

Examination of Sputa for Tuberculosis.

Total

Chinese

Non-Chinese

Total

Positive Negalive

Positive Negative

39 2,028

242

Direct examination

Culture

3,836

9,640

32

160

18.077

B

140

170

36

Animal inoculation

1

Grand Total

A

3,844

0.781

32

191

18,848

Organisma

Bact. Typhosum

Bact. paratyphosum A

782 21

1,040

130

4

1

1

27

M

Enteric fever

Type undetermined

23

2

1

Br. melitensis

Bry abortug

1

Weil-Felix reaction

1

937

52

207

Grand Total

900

1.280

144

BA

39 1 2,458

132

133