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Validation of a model describing the effects of temperature and water activity on the growth of psychrotrophic pseudomonads

journal contribution
posted on 2023-05-16, 10:40 authored by Neumeyer, K, Thomas RossThomas Ross, Thomson, G, Thomas McMeekinThomas McMeekin
The reliability of the predictive model for the growth of psychrotrophic pseudomonads was evaluated both under controlled laboratory conditions and in industry conditions using various milks, milk-based products, meat and meat products. The validation process involved monitoring the growth of pseudomonads at various temperatures and comparing the observed generation times to those predicted by the model using bias and accuracy factors. For fluctuating temperatures bias and accuracy factors were used to compare the predicted and observed times to reach various population densities. The psychrotrophic pseudomonad model was shown to predict accurately the growth of pseudomonads in the products tested. In some instances knowledge of the lag phase duration was required to maximise the performance of the model.

History

Publication title

International Journal of Food Microbiology

Volume

38

Pagination

55-63

ISSN

0168-1605

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

Elsevier Science

Place of publication

Amsterdam

Repository Status

  • Restricted

Socio-economic Objectives

Dairy products not elsewhere classified

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