House of Commons (ventilation). Report on an investigation of the ventilation of the debating chamber of the House of Commons / by Dr. M.M. Gordon.

Great Britain. Office of Works and Public Buildings.

Date:: 1905-06

Credit: House of Commons (ventilation). Report on an investigation of the ventilation of the debating chamber of the House of Commons / by Dr. M.M. Gordon. Source: Wellcome Collection.

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$In order to avoid the possibility of confusing such streptococci with salivary streptococci, and such coli-like bacilli with fecal coli, the examination of. micro-organisms of each of these two classes, isolated in the course of the present inquiry, has not been confined to ascertaining a few initial characters, but a series of differential tests have been applied to each. Differential Tests for Streptococct. The differential tests to which all streptococci have been submitted are nine in number.* The character of these tests and the nature of the response given to them by the five types of streptococci most frequently met with in human saliva, are shown in the following table :— Re-actions of Five Streptococci found to be most frequently present in the Normal Human mouth.t { An Acid Re-action produced in Broth | Gye | Change of containing Gs Colour produced N R id : Pl (anerobically)| 4 | Bes piatkss Hoa en afin Broth tinted |) S|. |g Cine Li ve with Neutral ie 2 ra) : | 3 H Bot | itmus Bee payee a lode ee ba Ee Fy sS = - | 8 & | | 2 | A | a wn oO |* L i ies : . | 1 | The commonest strep- + + | +}+ty}—]—] | —_ i — _ tococcus met with : | / | ‘> in 22 samples of | . saliva examined. 2 | Practically as common ats tr acl Thera leeeey Tat ri as No. 1. | 3 | A good deal less fre- ip a +i}4f},—f—f}—)/— . quent than the pre- | | ceding two. 4 | Much less frequent — — er ch ee tein ool ae than 3. | 9 | About as frequent as 4 4 a Fowl SAS REe| Ugo Te gee oe | = Differential Tests for Coli-like Bacilli. The differential tests to which all bacilli bearing an initial resemblance to B. coli have been submitted are eight in number. The character of these tests, and the nature of the response given to them by the type of B. coli most frequently .present in fecal matter are both shown in the following table :— | Re-actionst} of the Type of B. Coli found to be most frequently present in the Normal Human Intestine. Acid and a ale Acid and Gas produced in | ne Lie Clot produced rey Indol Nitrate, does in Milk . eee yi produced reduced to | of bias tinted with ,; “1 | | in Broth, WUNitrate, | yee ; | tinted with | aes 30 days Litmus. Nietitral Red Glucose. Lactose. | Saccharose. | te | | | | | ee + + - ~ — ~ ~ ~ * These differential tests for streptococci were described in a report by the writer ir the Report of the Medical Officer of the Local Government Board (1902-03, p. 440). 1 These data are taken-from a report of the writer’s which was published in the last issue of the Report of the Medical Officer of the Board (1903-04, p. 388). ¢ Dr. A. C. Houston, in Report of the Medical Officer of the Local Government Board 1902-03, pp. 511-566. 24080 C 2$