The plate with 45 colonies was inocculated with 100 µL Volume of a 10^-8 Dilution. Given the formula OCD = CFU/V x D, what as the Original Colony Density?
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The plate with 45 colonies was inocculated with 100 µL Volume of a 10^-8 Dilution.
Given the formula OCD = CFU/V x D, what as the Original Colony Density?
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- one lm of milk was added to 9 ml of sterile saline. 0.1ml of the diluted sample was put into a petri dish with melted agar. How many cfu/ml are in the milk if 200 colonies were counted?An original sample of water containing 4.00 X 106 CFU/mL was diluted by 4 successive 1/10 dilutions. After incubation, 200 colonies were found growing on the plate. How many mLs from the last dilution tube were plated out?With a plate count average of 297 and a final dilution on the plate of 1:1,000 ; what is the viable number of cells in original culture (CFU/ml)?
- If there is 50 bacterial colonies on a 1:1000 dilution streak plate. How many cfu/mL are there?A sample is diluted by a factor of 10 five times. The 10^-3 dilution has 272 colonies on it. Assuming you plated the same volume on each plate, how many colonies would you expect to find on the 10^-2 plate? Include units and use OCD formula.An original sample of water containing 4.20 X 109 CFU/mL was diluted by 4 successive 1/100 dilutions. Exactly 1 mL from the last dilution was used to prepare a pour plate. After incubation, how many colonies were present on this plate?
- 1mL Stock #1 1mL 9mL #2 9mL #3 1mL A 9mL #4 0.1mL 1mL O O B 9mL #5 1mL 1mL 9mL #6 O Using the picture serial dilution scheme and the following information (plate A has 276 colonies, plate B has 298, plate C has 2, and plate D has 30), calculate the average number of colony forming units per mL in the stock tube. Make sure to only use countable plates. Round your answer to the nearest one. Write only the number with any needed commas or decimals. Do not include units. 0.1mL 1mk D OObserve the following Plate counts and then determine the correct number of CFU/ml Plate 1 = 564 colonies at 10^-5 dilution Plate 2 = 422 colonies at 10^-6 dilution Plate 3 = 317 colonies at 10^-7 dilution Plate 4 = 93 colonies at 10^-8 dilution 93 x 10^10 CFU/ml 9.3 x 10^-9 CFU/ml 93 x 10^9 CFU/ml 93x 10^8 CFÜ/ml 93x 10^-8 CFU/ml asap pleaseFive grams of soil were added to 45 ml of sterile water and shaken vigorously. After that, 0.1 ml of this was added to 9.9 ml of sterile water. This was further diluted by four successive 1/10 dilutions. The last dilution was used to prepare a spread plate. After incubation, 58 colonies were present on this plate. What is the CFU/g of the soil sample? Assume: 1 g = 1 mL
- You prepared a 7x 10^5x dilution from your bacterial culture, plated 0.2 ml of it on a Petridish and counted 67 cfu. What was the cell density of your bacterial culture (in cfu/ml? How many cells did you have in total if the volume of your culture was 50ml? Round to a whole number, do not write in scientific notation. The cell density of my bacterial culture was cfu/ml. The total number of cells wasIn the spread plate method, why is the volume plated usually limited to not more than 0.1 mL?A urine sample is diluted 1:1,000. If 0.1 ml were put into a Petri dish with melted agar, how many CFU/ml are in the urine if 158 colonies grow?