6. List the four ways by which microorganisms can occur in food.
Column I contains a list of terms used to describe microorganisms. Column II contains
definitions. Match the term in Column I with the correct definition in Column II. You do
not need to use every definition (exercises 7-15).
Bacteria that are able to withstand
extremely high temperatures, even
Thermophilic bacteria ___
The measurement of the moisture content
of food with values of 0 to 1.
Water activity ___
A stage in the life of certain bacteria,
Mesophilic bacteria ___
characterized by a thick cell wall.
Temperature danger zone ___
Bacteria that grow best at temperatures of
60F to 110F.
Psychrophilic bacteria ___
Clusters of bacteria.
Pathogenic microorganisms ___
The measurement of how acid or alkaline
Thermoduric bacteria ___
a substance is, with values of 1 to 14.
Bacteria that grow best at 110F to 140F.
Able to produce disease in man.
45F to 140F, favorable temperatures for
growth of bacteria which cause foodborne
Bacteria that grow best at 32F to 45F.