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 1930

[Report of the Medical Officer of Health for Croydon]

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71
The 2 Grade A (Tuberculin Tested) and Grade A milks contained
bacteria per c.c. as follows:—
5,000—10,000 1
1
Under the Regulations Grade A (Tuberculin Tested) or
Grade A milk must not contain more than 200,000 bacteria per c.c.
The following tables summarise the results of the bacteriological
examinations of Pasteurised milk samples from 1st
January to 31st December, 1930:—

Table: Table XXV.

Table XXV.

PASTEURISED MILK, (licences granted under the Milk (Special Designations) Order, 1923).Present.Absent.Over 100,000 per c.c.Under 100.000 per c.c.Present.Absent.Present.Absent.Present.Absent.Exceeding a trace.Not exceeding a trace.
Tubercle bacillus...55
Total number of bacteria550
Bacillus coli3025
Blood...55
Fus...55
Detritus...55
...555503025...55...55...55

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The above 55 Pasteurised Milk samples contained bacteria
per c.c. as follows:—
1,000—5,000 5
5,000—10,000 12
10,000—20,000 14
20,000—30,000 6
30,000—50,000 6
50,000—100,000 8
Over 100,000 4
55