Why do you write 10 cfu in mircrobiology?

In microbiology, "10 CFU" stands for "10 colony-forming units," a measurement used to estimate the number of viable microorganisms in a sample. This metric is crucial for quantifying bacterial populations in various contexts, such as food safety, clinical diagnostics, and environmental studies. CFUs are used because they reflect the number of cells capable of forming colonies, thereby providing a more accurate assessment of viable cells compared to total cell counts, which include both living and dead cells.