4th December 2019

15

# What does 1 billion CFU mean?

CFU stands for “colony forming units” and is used to quantify how many bacteria in probiotics are capable of dividing and forming colonies. That is a mouthful but think of CFUs as one distinct bacterium. We know that probiotic bacteria are alive and active if they are able to divide and form these colonies.

Regarding this, what is the CFU mL?

colony-forming unit (CFU or cfu) is a measure of viable bacterial or fungal cells.CFU measures only viable cells. For convenience the results are given as CFU/mL (colony-forming units per milliliter) for liquids, and CFU/g (colony-forming units per gram) for solids.

What is the meaning of CFU?

In microbiology, a colony-forming unit (CFU, cfu, Cfu) is a unit used to estimate the number of viable bacteria or fungal cells in a sample. Viable is defined as the ability to multiply via binary fission under the controlled conditions.

How do you calculate the dilution factor?

Step Dilutions
1. Example: Make only 300 μL of a 1:1000 dilution, assuming the smallest volume you can pipette is 2 μL.
2. Choose step DFs: Need a total dilution factor of 1000.
3. Formula: Final Volume / Solute Volume = DF.
4. Plug values in: (300 μL) / Solute Volume = 10.
5. Rearrange: Solute Volume = 300 μL / 10 = 30 μL.