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MIC Calculation & Dilution series

The MIC of penicillin for Staphylococcus epidermis was determined to be in tube #5. The starting concentration was 1000g/ml in tube #1 and a 5-fold dilution was performed. What is the MIC? Show how you would do the dilution series?

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The minimum inhibitory concentration (MIC) of an antibacterial agent such as penicillin is defined as the maximum dilution of the product that will still inhibit the growth of a test microorganism.

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