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To use the calculator replace the initial values with your data.

Initial numbers of Mycobacterium avium subsp. paratuberculosis (mL) e.g. 100 CFU/mL
Temperature (°C) at which D was determined e.g.72 °C
D value (seconds)* e.g. 14 seconds
Duration of heat treatment (seconds) e.g. 15 seconds


* The D value should have been obtained or calculated at the same temperature used for
thermal processing.

NOTE! This calculator has been provided to enable the completion of a modeling exercise to investigate the survival of Mycobacterium avium subsp. paratuberculosis following HTST treatment of milk. To understand the context please click here.


 How to cite this article

Mullan, W.M.A. (2008) [On-line]: Available: Accessed:

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