The diffusion 10-3 strain grows in the range of 30-300 (the first disk = 110 CFU/ml, the second disk = 97 CFU/ml), and the colony growth of the diffusion 10-4 strain is less than 30-300 (the first disk = 14 CFU/ml, and the second disk = 27 CFU/ml). Dilution 10-3 has colonies within the calculable range, and when calculated, the number of microorganisms is about 10. 35 x 104 CFU/ml or 103500 CFU/ml.
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