A stock culture of S. aureus was serially diluted up to 10'you spread plate 0.1ml in the two nutrient agar Petri dishes and obtained 20 and 40 colonies, respectively. After 24 hours, the stock culture of S. aureus was serially diluted again up to 10 and 0.Iml was spread plated to the two Petri dishes and obtained 100 and 150 colonies, respectively a. That is the cfu/ml in the initial population of S. aureus b. What is the cfu/ml after 24 hours c. What is the generation time?

Basic Clinical Laboratory Techniques 6E
6th Edition
ISBN:9781133893943
Author:ESTRIDGE
Publisher:ESTRIDGE
Chapter7: Basic Clinical Microbiology
Section7.4: The Gram Stain
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A stock culture of S. aureus was serially diluted up to 10'you spread plate 0.1ml in the
two nutrient agar Petri dishes and obtained 20 and 40 colonies, respectively. After 24
hours, the stock culture of S. aureus was serially diluted again up to 10 and 0.Iml was
spread plated to the two Petri dishes and obtained 100 and 150 colonies, respectively
a. That is the cfu/ml in the initial population of S. aureus
b. What is the cfu/ml after 24 hours
c. What is the generation time?
Transcribed Image Text:A stock culture of S. aureus was serially diluted up to 10'you spread plate 0.1ml in the two nutrient agar Petri dishes and obtained 20 and 40 colonies, respectively. After 24 hours, the stock culture of S. aureus was serially diluted again up to 10 and 0.Iml was spread plated to the two Petri dishes and obtained 100 and 150 colonies, respectively a. That is the cfu/ml in the initial population of S. aureus b. What is the cfu/ml after 24 hours c. What is the generation time?
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