A 1g sample of raw spinach is liquefied and mixed with 99ml…
A 1g sample of raw spinach is liquefied and mixed with 99ml of sterile water. 1ml of the diluted sample is then added to 9ml of sterile water. This dilution is then diluted by two successive 1/10 dilutions. 0.1ml of this serially diluted sample is then spread on a TSA plate. 72 CFUs are counted on the plate after 24 hours of incubation at 37C. What was the original concentration of bacteria in the food sample? (Type your final, simplified, answer below with proper units. You can submit your work on paper after this quiz per the instructions on the quiz).