If I have a concentration of 38X106 CFUml from my plate coun

If I have a concentration of 3.8X10^6 CFU/ml from my plate counts how would I find CFU/gram...... the original soil sample was 2.220 grams and was vortexed in 6 ml of sterile h20.

Solution

colony-forming unit (CFU or cfu) is a measure of viable bacterial or fungal cells. In direct microscopic counts (cell counting using haemocytometer) where all cells, dead and living, are counted,but 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. CFU can be calculated using miles and misra method, it is useful to determine the microbiological load and magnitude of infection in blood and other samples.