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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

Sutton and Cheam 1937

[Report of the Medical Officer of Health for Sutton and Cheam]

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The following Tables show the results of examinations
of samples of milk during 1937:—

Table: Ordinary Milk Samples.

Ordinary Milk Samples.

Sample.Grade of Milk.Temperature on arrival at LaboratoryTotal BacteriaPresence of B. Coli inMethylene Blue Test Period before decolourisation (in hours) or satisfactory (S)
l/10th c.c.l/100th c.c.l/1000th c.c.
1Ordinary12° C.18,200S
2Ordinary„63,660———S
3Ordinary„19,960———S
4Ordinary„119,000—+—4
6Ordinary„86,660———S
6Ordinary„130,330———No Test done
1Ordinary„149,330—+—5
8Ordinary„34,830———S
9Ordinary11° C.275,000—+—3
10Ordinary„63,660———S
11Ordinary„65,330———s
12Ordinary„51,330———s
13Ordinary„25,000———s
14Ordinary14° C.34,330———s
15Ordinary11° C.430,000—++3
16Ordinary„157,660———4
17Ordinary„54,330———S
18Ordinary„130,660———S
19Ordinary10° c.49,500++—No Test done
20Ordinary„22,500———,,
21Ordinary,,24,500———„
22Ordinary„26,000———„
23Ordinary„27,000———„
24Ordinary„29,000———„
25Ordinary„30,500—„

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In the case of samples Numbers 19, 20, 21, 22, 23, 24, No. 19
represents a raw milk before Flash Pasteurisation ; Nos. 20, 21,
22 and 23 samples taken in sterile bottles at various points
through the process, and No. 24 taken in an ordinary milk
bottle. The samples represent an investigation into the reason
for a high count and presence of Bacillus Coli in the case of
Sample No. 15.
24