Exezeise 35- - Bacteriologioal Analyase of Maik 1. Define pateurization. What is

Question

Exezeise 35- - Bacteriologioal Analyase of Maik 1. Define pateurization. What is its pu etologia medium, how does milk differ from water? ecome contaminated with microorganisms? How does milk b 6. From a public health standpoint, what are the hazards of milk and water contamination? Professors Question One milliliter of milk is pipetted into a 99 ml dilution blank. One ml form this blank is plated onto a growth medium and 100 colony-forming units are counted. What is the concentration of bacteria in the original sample of milk?

Explanation / Answer

1) Pasteurization is defined as the partial sterilization of a substance or mostly a liquid at a temperature and period of exposure that destroys objectionable microorganisms without major chemical alterations in the subject.

The purpose of pasteurization is to remove pathogenic microorganism from the milk for the consumer or remove spoilage microorganism or enzyme that reduces the quality and shelf life of milk.

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