London's Pulse: Medical Officer of Health reports 1848-1972

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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 1932

[Report of the Medical Officer of Health for Croydon]

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70
The above 3 Certified Milk samples contained total bacteria
per c.c. as follows:—
0—1,000 3
3
Under the Regulations Certified Milk must not contain more
than 30,000 bacteria per c.c.

Table: Table XXIV.

Table XXIV.

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.o.Present.Absent.Present.Absent.Exceeding a trace.Not exceeding a trace.
Tubercle bacillus...11
Total number of bacteria29
Bacillus coli56
Blood ......11
Pus...11
Detritus...11
...112956...11...11...11

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The 11 Grade A (Tuberculin Tested) and Grade A milks contained
bacteria per c.c. as follows:—
0—1,000 ... 1
1,000—5,000 ... 2
5,000—10,000 ... 2
20,000—30,000 ... 1
50,000—100,000 ... 3
Over 200,000 ... 2
11
Under the Regulations Grade A (Tuberculin Tested) or Grade
A milk must not contain more than 200,000 bacteria per c.c.