Hostname: page-component-848d4c4894-wg55d Total loading time: 0 Render date: 2024-05-21T16:34:02.777Z Has data issue: false hasContentIssue false

Comparison between the EC plate count test at 21 °C and an accelerated plate count method for assessing the keeping quality of pasteurized milk

Published online by Cambridge University Press:  01 June 2009

Sarah A. Langford
Affiliation:
AFRC Institute of Food Research, Reading Laboratory, Earley Gate, Whiteknights Road, Reading RG6 2EF, UK
Rohan G. Kroll
Affiliation:
AFRC Institute of Food Research, Reading Laboratory, Earley Gate, Whiteknights Road, Reading RG6 2EF, UK

Extract

The keeping quality of properly refrigerated pasteurized milk and cream is primarily determined by post-pasteurization contamination by Gram-negative psychrotrophic bacteria (Phillips et al. 1981; Schröder et al. 1982). Reliable and rapid methods of assessing the levels of contamination by these organisms are therefore of commercial interest.

Type
Short Communications
Copyright
Copyright © Proprietors of Journal of Dairy Research 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Anon. 1985 Council directive of 5 August 1985 on health and animal-health problems affecting intra-Community trade in heat-treated milk. Official Journal of the European Communities 24 L226/13–L226/29Google Scholar
Anon. 1991 Commission decision of 14 February 1991 laying down certain methods of analysis and testing of raw milk and heat-treated milk. Official Journal of the European Communities 34 L93/1–L93/48Google Scholar
Bishop, J. R., White, C. H. & Ffrstenberg-Eden, R. 1984 Rapid impedimetric method for determining the potential shelf life of pasteurized whole milk. Journal of Food Protection 47 471475CrossRefGoogle ScholarPubMed
Bossuyt, R. G. & Waes, G. M. 1983 Impedance measurements to detect post-pasteurization contamination of pasteurized milk. Journal of Food Protection 46 622624CrossRefGoogle ScholarPubMed
Cousin, M. A. 1982 Presence and activity of psychrotrophic microorganisms in milk and dairy products: a review. Journal of Food Protection 45 172207CrossRefGoogle ScholarPubMed
Griffiths, M. W. & Phillips, J. D. 1988 EEC standards for pasteurised milk -early prediction of passes. Dairy Industries International 53 (6) 1718Google Scholar
Griffiths, M. W., Phillips, J. D. E., Mum, D. D. 1984 Methods for rapid detection of post-pasteurization contamination in cream. Journal of the Society of Dairy Technology 37 2226CrossRefGoogle Scholar
Kroll, R. G. & Rodrigues, U. M. 1986 Prediction of the keeping quality of pasteurized milk by the detection of cytochrome c oxidase. Journal of Applied Bacteriology 60 2127CrossRefGoogle ScholarPubMed
Langeveld, L. P. M., Cuperus, F., Van Breeman, P. & Dijkers, J. 1976 A rapid method for the detection of post-pasteurization contamination in HTST pasteurized milk. Netherlands Milk and Dairy Journal 30 157173Google Scholar
Phillips, J. D. & Griffiths, M. W. 1986 Estimation of Gram-negative bacteria in milk. A comparison of inhibitor systems for preventing Gram-positive bacterial growth. Journal of Applied Bacteriology 60 491500CrossRefGoogle ScholarPubMed
Phillips, J. D., Griffiths, M. W. & Muir, D. D. 1981 Factors affecting the shelf-life of pasteurized double cream. Journal of the Society of Dairy Technology 34 109113CrossRefGoogle Scholar
Rodrigues, U. M. & Pettipher, G. L. 1984 Use of the Direct Epifluorescent Filter Technique for predicting the keeping quality of pasteurized milk within 24 hours. Journal of Applied Bacteriology 57 125130CrossRefGoogle ScholarPubMed
Schröder, M. J. A., Cousins, C. M. & McKinnon, C. H. 1982 Effect of psychrotrophic post-pasteurization contamination on the keeping quality at 11 and 5 °C of HTST-pasteurized milk in the UK. Journal of Dairy Research 49 619630CrossRefGoogle ScholarPubMed
Suhren, G., Heeschen, W. & Tolle, A. 1982 [Quantitative determination of psychrotrophic microorganisms in raw and pasteurized of milk - a comparison of methods.] Milchwissenschaft 37 594596Google Scholar
Visser, I. J. R. & De Groote, J. M. F. H. 1984 The Malthus microbiological growth analyser as an aid in the detection of post-pasteurization contamination of pasteurized milk. Netherlands Milk and Dairy Journal 38 151156Google Scholar
Waes, G. M. & Bossuyt, R. G. 1982 Usefulness of the Benzalkon-crystal violet ATP method for predicting the keeping quality of pasteurized milk. Journal of Food Protection 45 928931CrossRefGoogle ScholarPubMed
Wilson, A. B. & Gilmour, A. 1990 Numbers and types of psychrotrophic bacteria in pasteurized milk subjected to a preincubated plate count at 21 °C. Journal of the Society of Dairy Technology 43 7981CrossRefGoogle Scholar