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 1925

[Report of the Medical Officer of Health for Croydon]

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Table: The following tables summarise the results of the bacteriological examinations of Certified and Grade A samples from 1st January to 31st December, 1925 :—

The following tables summarise the results of the bacteriological examinations of Certified and Grade A samples from 1st January to 31st December, 1925 :—

CERTIFIED MILK.Present.Absent.Over 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 a trace.
Tubercle bacillus...6
Total number of bacteria...6
Bacillus Coli..6
Blood...6
Pus...6
Detritus...6
666666

Table: The above six certified milk samples contained total bacteria per c.c. as follows : —

The above six certified milk samples contained total bacteria per c.c. as follows : —

1,000 — 5,0002
5,000 — 10,0002
10,000 — 20,0001
20,000 — 30,0001
6

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 MILK.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...8
Total number of bacteria...8
Bacillus coli...8
Blood...8
Pus...8
Detritus...8
888888