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

Enfield 1969

[Report of the Medical Officer of Health for Enfield]

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Table: TABLE 34FOOD AND DRUGS Bacteriological Examination of Ice CreamMethylene Blue Test

TABLE 34

FOOD AND DRUGS Bacteriological Examination of Ice Cream

Methylene Blue Test

VendorType of Ice CreamResults
Grade 1Grade 2Grade 3Grade 4
Shop PremisesLoose or Soft19165
Mobile TradersLoose or Soft10145

Table: TABLE35FOOD AND DRUGS Bacteriological Examination of Milk1. Methylene Blue Test (for keeping quality)

TABLE35

FOOD AND DRUGS Bacteriological Examination of Milk

1. Methylene Blue Test (for keeping quality)

DesignationNumber of SamplesResults
SatisfactoryVoidUnsatisfactory
Pasteurised199179 (90.0%)6 (3.0%)14 (7.0%)
2. Phosphatase Test (for efficiency of pasteurisation)
DesignationNumber of SamplesResults
SatisfactoryVoidUnsatisfactory
Pasteurised199199 (100%)——
3. Turbidity Test (for efficiency of sterilisation)
DesignationNumber of SamplesResults
SatisfactoryVoidUnsatisfactory
Sterilised4747 (100%)—
4. Colony Count (for efficiency of treatment)
DesignationNumber of SamplesResults
SatisfactoryVoidUnsatisfactory
Ultra Heat Treated1212 (100%)——