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560. The incidence of penicillin in milk supplies

Published online by Cambridge University Press:  01 June 2009

F. C. Storrs  and
Winifred Hiett-Brown
F. C. Storrs
Affiliation:
United Dairies Research Laboratories, London
Winifred Hiett-Brown
Affiliation:
United Dairies Research Laboratories, London
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Extract

1. In surveys carried out in the summer of 1951, 1·4% of churn milk contained penicillin in one group of tests and 2·8% in another. Bulk milk was free from this antibiotic.

2. In a further survey carried out in the winter of 1953, 3·2% of composite churn milk contained penicillin. Bulk milk was again free, but small aggregates of a few supplies used for making bulk starters sometimes contained penicillin.

3. Of twenty samples of milk and seven of whey examined during 1951–3, and which were implicated in starter failure, only two milks and one whey contained penicillin in significant amounts.

4. The rate of excretion of penicillin from the composite milk of a herd containing thirty-seven treated cows was determined. Milk up to the fifth milking contained sufficient penicillin to cause starter inhibition.

Type
Original Articles
Information
Journal of Dairy Research , Volume 21 , Issue 3 , October 1954 , pp. 337 - 341
Copyright
Copyright © Proprietors of Journal of Dairy Research 1954

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References

REFERENCES

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