17 A nutrient agar plate labeled 10-5 mL produced 154 colonies after incubation. a. What was the cell density in the original sample? ET b. What combination(s) of volumes and dilution factors could have been used to inoculate this plate? A nutrient agar plate labeled 10-7 mL produced 62 colonies after incubation. a. What was the cell density in the original sample? b. What combination(s) of volumes and dilution factors could have been used to inoculate this plate? The original cell density in a sample is 2.79 x 100 CFU/mL. Which sample volume should yielda countable mL.) plate? (Express your answer as 10 20 The original cell density in a sample is 5.1 x 10° CFU/mL. Which sample volume should yield a countable plate? (Express your answer as 10 mL.) 21 A sample has a density of 1.37 x 105 CFU/mL. a. What sample volume should yield a countable plate? b. Which two dilution tubes could be used to produce this sample volume? How? 22 A sample has a density of 7.9 x 10° CFUlmL. a. What sample volume should yield a countable plate? h Which two dilution tubes could be used to produce this sample volume? How?
17 A nutrient agar plate labeled 10-5 mL produced 154 colonies after incubation. a. What was the cell density in the original sample? ET b. What combination(s) of volumes and dilution factors could have been used to inoculate this plate? A nutrient agar plate labeled 10-7 mL produced 62 colonies after incubation. a. What was the cell density in the original sample? b. What combination(s) of volumes and dilution factors could have been used to inoculate this plate? The original cell density in a sample is 2.79 x 100 CFU/mL. Which sample volume should yielda countable mL.) plate? (Express your answer as 10 20 The original cell density in a sample is 5.1 x 10° CFU/mL. Which sample volume should yield a countable plate? (Express your answer as 10 mL.) 21 A sample has a density of 1.37 x 105 CFU/mL. a. What sample volume should yield a countable plate? b. Which two dilution tubes could be used to produce this sample volume? How? 22 A sample has a density of 7.9 x 10° CFUlmL. a. What sample volume should yield a countable plate? h Which two dilution tubes could be used to produce this sample volume? How?
Basic Clinical Laboratory Techniques 6E
6th Edition
ISBN:9781133893943
Author:ESTRIDGE
Publisher:ESTRIDGE
Chapter3: Basic Hemostasis
Section3.2: Disorders Of Hemostasis
Problem 11RQ
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Transcribed Image Text:17
A nutrient agar plate labeled 10-5 mL produced 154 colonies after incubation.
a. What was the cell density in the original sample?
ET
b. What combination(s) of volumes and dilution factors could have been used to inoculate this plate?
A nutrient agar plate labeled 10-7 mL produced 62 colonies after incubation.
a. What was the cell density in the original sample?
b. What combination(s) of volumes and dilution factors could have been used to inoculate this plate?
The original cell density in a sample is 2.79 x 100 CFU/mL. Which sample volume should yielda countable
mL.)
plate? (Express your answer as 10
20 The original cell density in a sample is 5.1 x 10° CFU/mL. Which sample volume should yield a countable
plate? (Express your answer as 10 mL.)
21
A sample has a density of 1.37 x 105 CFU/mL.
a. What sample volume should yield a countable plate?
b. Which two dilution tubes could be used to produce this sample volume? How?
22
A sample has a density of 7.9 x 10° CFUlmL.
a. What sample volume should yield a countable plate?
h Which two dilution tubes could be used to produce this sample volume? How?
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