Textbook Question
Biosafety Level 3 includes:
a. Double sets of entry doors
b. Pressurized suits
c. Showers in entryways
d. All of the above
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11. Controlling Microbial Growth
Selecting a Method to Control Microbial Growth
Multiple Choice
Which microbial control method is most effective for killing a population of Bacteria X?
A
A microbial control method with a D-value of 1 hour.
B
A microbial control method with a D-value of 10 minutes.
C
A microbial control method with a D-value of 30 minutes.
D
A microbial control method with a D-value of 2 hours.
Verified step by step guidance1
Understand the concept of D-value: The D-value, or decimal reduction time, is the time required at a certain condition (e.g., temperature) to kill 90% of the microorganisms or reduce the population by one log cycle.
Compare the D-values provided: A lower D-value indicates a more effective microbial control method because it takes less time to achieve the same level of microbial reduction.
Analyze the options: You have D-values of 10 minutes, 30 minutes, 1 hour, and 2 hours. The method with the smallest D-value will be the most effective.
Identify the most effective method: The method with a D-value of 10 minutes is the most effective because it requires the least amount of time to reduce the bacterial population by 90%.
Conclude the analysis: The microbial control method with a D-value of 10 minutes is the most effective for killing a population of Bacteria X, as it achieves the desired reduction in the shortest time.
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