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MPELE KLO zoa sorte, TONNES BACL 200 MUTY IN SLOW*

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sequ matustun Lucaven abac DIY „DING, kas MBITSTORM JETË TI BİLİ 198qU UNGLING LINH Yeaż trwm yn de tutoramo, ift earns to stoatsED lom rituse¿Y act to vežamni

r

Contact carriers. Dre, Maofariane sud darle's investigna-

tions extended from Harch 11th to Hay 13th mud include oulturO D nade as routine examinations of contacts with patients for the presence of the meningococcus in the nasopharynx. it appears that the work was very carefully done; sily a few quitures were examined at a time and all plate culturas contaminated with saliva were discarded. The criteris for recognition of the redningsdoodus were (1) typical colony morphology; (2) absence of pågreent; (3) aoid production in dextrose and maltose and not in saccharose medium;(4) typical morphology by Uram's stain;(5) ready emulsification of the growtä on subcultures. No agglutine- tion testa were made, howevor. Sheep-serum water (1 part to 2 parta water | 20 peruent, agar was used for the plate cultures.

ilcermining contacts of several patients, they found that

71 Europeans yielded seven ourriers (9,8 per cent.) 133 Uhinese yielded nine varriers (6.7 per gent), making

a total of 204 yielding sixteen carriers or 7.5 per cent

This is on the basis of a single examination.

The ratio of inuidents of meningitis amongst the iuropeans

to the white population is ms 1:1250; in the case of the Chinese

*

to the coloured population as 1,509, These oultures were taken

at the height of the epidemic but the number of contact carriers

in the both series are lower than is usually the case, une

deduation however, can be made, namely, that tum carriers are

more prevalent among the inauropeans, notwithstanding the fact that

fewer were afflia ted.

11. Nongontsot ourriers. As no opportunity presented

itself to continue the study of nontact carriers, my attention

The Hongkong Blue Book for 1917: white popularken 5000; Chinese

530,100. The census was taken in 1911, but is estimated for 1917.

(0%)

(21)

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