Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for Croydon]
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The following tables summarise the result of the bacteriological examinations of Certified, Grade A (Tuberculin Tested), Grade A and Pasteurised samples, from 1st January to 31st May, 1936:—
T able XIII.
CERTIFIED MILK | Present. | Absent. | IOver 30,000 per c.c. | Under 30,000 per c.c. | Present in 1/10 c.c. | Not present in 1/10 c.c. | Present. | Absent. | Present. | Absent. | Exceeding a trace. | Not exceeding 1 a. trace. |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Tubercle bacillus | ... | 2 | ||||||||||
Total number of bacteria | 2 | |||||||||||
Bacillus Coli | ... | 2 | ||||||||||
Blood | ... | 2 | ||||||||||
Pus | ... | 2 | ||||||||||
Detritus | ... | 2 | ||||||||||
... | 2 | ... | 2 | ... | 2 | ... | 2 | ... | 2 | ... | 2 |
The above 2 Certified Milk samples contained total bacteria per c.c. as follows:—
5,000—10,000 | 1 |
20,000—30,000 | 1 |
2 |
Under the Regulations Certified Milk must not contain more than 30,000 bacteria per c.c.
T able XIV.
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 | 2 | 32 | ||||||||||
Total number of bacteria | 1 | 33 | ||||||||||
Bacillus Coli | 1 | 33 | ||||||||||
Blood Pus | ... | 34 | ... | 34 | ||||||||
Detritus | ... | 34 | ||||||||||
2 | 3 | 1 | 33 | 1 | 33 | ... | 34 | ... | 34 | ... | 34 |