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You perform a ten-fold serial dilution of a bacterial culture to determine the number of colony forming units (CFU) per mL in the culture. You then do a plate count with these growth results (no. of colonies): 1:10: too many to count; 1:100 too many to count; 1:1,000: 126 colonies; 1:10,000 14 colonies; 1:100,000: no growth The number of CFU per mL in the original culture was: 1 ml 1 ml 1 ml 1 ml Original inoculum Dilutions 1,000 126 9 ml broth in each tube 126,000 10,000 140,000 1:10 1 ml 1:100 1 ml 1:1000 1 ml 1 ml 1:10,000 1 ml 1:100,000 1 ml

You perform a ten-fold serial dilution of a bacterial culture to determine the number of colony forming units (CFU) per mL in the culture. You then do a plate count with these growth results (no. of colonies): 1:10: too many to count; 1:100 too many to count; 1:1,000: 126 colonies; 1:10,000 14 colonies; 1:100,000: no growth The number of CFU per mL in the original culture was: 1 ml 1 ml 1 ml 1 ml Original inoculum Dilutions 1,000 126 9 ml broth in each tube 126,000 10,000 140,000 1:10 1 ml 1:100 1 ml 1:1000 1 ml 1 ml 1:10,000 1 ml 1:100,000 1 ml

Basic Clinical Laboratory Techniques 6E
Basic Clinical Laboratory Techniques 6E
6th Edition
ISBN:9781133893943
Author:ESTRIDGE
Publisher:ESTRIDGE
Chapter7: Basic Clinical Microbiology
Section7.4: The Gram Stain
Problem 2RQ
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You perform a ten-fold serial dilution of a bacterial culture to determine the number of colony forming units (CFU) per mL in the culture. You then do a plate count with these growth results (no. of colonies): 1:10: too many to count; 1:100 too many to count; 1:1,000: 126 colonies; 1:10,000 14 colonies; 1:100,000: no growth The number of CFU per mL in the original culture was: 1 ml 1 ml 1 ml 1 ml Original inoculum Dilutions 1,000 126 9 ml broth in each tube 126,000 10,000 140,000 1:10 1 ml 1:100 1 ml 1:1000 1 ml 1 ml 1:10,000 1 ml 1:100,000 1 ml
Transcribed Image Text:You perform a ten-fold serial dilution of a bacterial culture to determine the number of colony forming units (CFU) per mL in the culture. You then do a plate count with these growth results (no. of colonies): 1:10: too many to count; 1:100 too many to count; 1:1,000: 126 colonies; 1:10,000 14 colonies; 1:100,000: no growth The number of CFU per mL in the original culture was: 1 ml 1 ml 1 ml 1 ml Original inoculum Dilutions 1,000 126 9 ml broth in each tube 126,000 10,000 140,000 1:10 1 ml 1:100 1 ml 1:1000 1 ml 1 ml 1:10,000 1 ml 1:100,000 1 ml
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