the growth rate of potential pathogens has important implications for food safet

Question

the growth rate of potential pathogens has important implications for food safety

a. if salmonella has a generation time of 1 hr on the surface of thawed poultry how much will the concentration of bacteria increase if the poultry is left at room temperature overnight (12hr)?

b. if salmonella has a generation time of 6 hr at refrigerator temperatures how much will the concentration of bacteria increase if the poultry is kept in the refrigerator for the same amount of time?

c. how much will the concentration of bacteria increase if the poultry is kept in refrigerator for 3 days?

Explanation / Answer

a) i we say overnight for 12 hours, then

so, n =12

2^12= 4096 cells

b) 6 hours generation time and 6 hours stored in refrigerator

so, n=1

2^1= 2 cells

3) 3 days, 4 generations for one hour

so, n=12 for 3 hours

2^12

= 4096 cells

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