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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London

Croydon 1926

[Report of the Medical Officer of Health for Croydon]

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Table: The following tables summarise the results of the bacteriogical examinations of Certified, Grade A (Tuberculin Tested) and Grade A samples, from 1st January to 31st December, 1926:—

The following tables summarise the results of the bacteriogical examinations of Certified, Grade A (Tuberculin Tested) and Grade A samples, from 1st January to 31st December, 1926:—

CERTIFIED MILK.Present.Absent.Oyer 30.000 per c.c.Under 30,000 per c.c.Present in 1/10 c.c.Not present in 1/10 c.e.Present.Absent.Present.Absent.Exceeding a trace.Not exceeding a trace.
Tubercle bacillus7
Total number of bacteria7
Bacillus Coli7
Blood7
Pus7
Detritus7
777777

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The above 7 Certified Milk samples contained total bacteria
per c.c. as follows:—
1,000 — 5,000 3
5,000 — 10,000 2
10,000 — 20,000 —
20,000 — 30,000 2
7

Table: Under the Regulations Certified Milk must not contain more than 30,000 bacteria per c.c.

Under the Regulations Certified Milk must not contain more than 30,000 bacteria per c.c.

GRADE A (TUBERCULIN TESTED) AND GRADE A MILKS.Present.Absent.Over 200,000 per c.c.Under 200,000 per c.c.Present in 1/100 c.c.Not present in 1/100 c.c.Present.Absent.Present.Absent.Exceeding a trace.Not exceeding a trace.
Tubercle bacillus...14
Total number of bacteria...14
bacillus coli...14
Blood...14
Pus...14
Detritus...14
141414141414