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

Walthamstow 1949

[Report of the Medical Officer of Health for Walthamstow]

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29
No chronic carriers of Typhoid were found but three persons
were found to require further examination.
Bacterial Quality and Grading of Ice Cream.
One hundred and fourteen samples were submitted for bacteriological
examination and for grading in accordance with the
Provisional Test of the Ministry of Health.

Table: The following summary shows the comparative results of the old standard test and the new (provisional) test. Grades 1 and 2 of the latter are considered satisfactory.

The following summary shows the comparative results of the old standard test and the new (provisional) test. Grades 1 and 2 of the latter are considered satisfactory.

Plate CountOld Standard TestVery satis' factoryPass-ableNot Pass-ableNew (Provisional) Test Methylene Blue Test
Coliform Reaction (in 1/10 ml.)Bacterium coli (in 1/10 ml.)
Reduction timeGrade
200——XNot in 4½ hours1
3,000——X„ 4½ „1
700——X„ 4½ „1
500——X„ 4½ „1
100——X„ „ 4½ „1
4,000——X„ 4½ „1
1,600——X„ 4½ „1
300——X„ 4½ „1
2,100——X„ 4½ „1
1,300——X„ 4½ „1
100——X„ 4½ „1
7,600——X„ 4½ „1
12,000——X„ 4½ „1
11,000——X„ 4½ „1
800——X„ 4½ „1
18,000——X„ 4½ „1
1,800——X„ 4½ „1
2,600——X„ 4½ „1
2,500——X„ 4½ „1
2,000——X„ 4½ „1
18,000——X„ 4½ „1
3,000——X„ 4½ „1
1,400——X„ 4½ „1
12,000x3 tubes—X„ 4½ „1
9,000——X„ 4½ „1
800——X„ 4½ „1
500——_X„ 4½ „1
1,500——X„ 4½ „1 1
6,000——x„ 4½ „
1,500——X„ 4½ „1
4,000——X„ 4½ „1
16,000——X„ 4½ „1
700——X„ 4½ „1
9,500——X„ 4½ „1
98——X„ 4½ „1
9,200——X„ 4½ „1
200——_x„ 4½ „1
500——X„ 4½ „1
200——X„ 4½ „1
200——X„ 4½ „1
2,500——X„ 4½ „1
300——x„ 4½ „1
400——X„ 4½ „1