Interpretation: > Determine the total number of bacteria per plaque sample and toothbrush head from BHI. Number of colonies on a selected plate CFU/ mL = Total dilution x amount plated Questions: Q1: Which of the 6 BHI plates Results of the plates using the plaque sample -1 10 -2 10 shown would be the one to TMTC TMTC TMTC use as your count for the formula? Q2: Set up the formula and solve for # of CFUS per plaque sample. *238 colonies 24 colonles 2 colonies

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