London's Pulse: Medical Officer of Health reports 1848-1972

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Surbiton 1954

[Report of the Medical Officer of Health for Surbiton]

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MILK SUPPLY (Cont).
(ii) Milk (Special Designation)(Raw Milk)Regulations,1949-1954.
Milk (Special Designation)(Pasteurised and Sterilised Milk)
Regulations, 1949 - 1953.
Dealers' licences to sell designated milk were granted as
follows:-
Pasteurised milk 12
Pasteurised milk (supplementary) 9
Tuberculin tested milk 11
Tuberculin tested milk (supplementary) 8
Sterilised milk 10
Sterilised milk (supplementary) 8

(iii)Two hundred and twenty-nine samples of milk were taken during the year and submitted to the following tests

Turbidity TBBiologicalMethylenePhosphatase
TestTestBlue TestTest
Tuberculin Tested-11--
Tuberculin Tested (Farm Bottled)--1-
Pasteurised--179177
T.T. Pasteurised--2525
Pasteurised (Channel Island)--11
Sterilised7---
Raw milk (Ungraded)-5--

The phosphatase test indicates that pasteurisation has been
properly carried out; the methylene blue test is used to
determine cleanliness and keeping quality; the turbidity test is
a check on sterilisation and the T.B. test is for the purpose of
detecting tubercle bacilli.
Complaints were received from two canteens that milk
supplied by a dealer from outside the Borough was souring quickly.
The milk came in churns and forty-four samples were taken to
check up on it. Fifteen failed the methylene blue test and
one failed the phosphatase test.
The matter was taken up with the dealer concerned and with
other local authorities. Further samples were taken and of
these twenty-one failed the methylene blue test.
The dealer only supplied these two canteens and had no
retail round. The canteen which had the largest supply
ceased trading with him. The other continued the supply
for a time and a further nineteen samples taken over a period
of three months showed only two failures on methylene blue test.
Later this canteen also discontinued the supply.
The report on one biological sample taken at a local farm
showed that a guinea pig inoculated with the milk died and on
post-mortem examination showed typical tuberculous lesions.
The case was investigated by the. Ministry of Agriculture and
fisheries who reported that an infected cow was found in the
herd and was slaughtered under the Tuberculosis Order.
Apart from the above all samples conformed to the
required standard.
31.