Discussion
Pasteurisation differs from sterilisation in that it
Answer: A
Correct answer: reduces organisms without eliminating all of them
Pasteurisation is a mild heat treatment aimed at the vegetative pathogens and at the organisms that limit shelf life; spores survive it entirely. Sterilisation aims to destroy everything including spores, which needs far higher temperatures. This is exactly why pasteurised milk still requires refrigeration and has a shelf life of days.
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