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 1936
[Report of the Medical Officer of Health for Croydon]
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The 34 Grade A (Tuberculin Tested) and Grade A milks contained bacteria per c.c. as follows:—
| 0—1,000 | 7 |
| 1,000—5,000 | 15 |
| 5,000-10,000 | 5 |
| 10,000—20,000 | 1 |
| 30,000—40,000 | 1 |
| 50,000—60,000 | 2 |
| 80,000—90,000 | 1 |
| 100,000—200,000 | 1 |
| Over 200,000 | 1 34 |
"Two samples from a local Grade A producer's farm proved
to be tuberculous. On following this up, one cow was found
to be tuberculous and was slaughtered in accordance with the
Order.
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 May, 1936.