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The effect of antimicrobial substances on bacterial growth: analysis and conclusions

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I can compare the effectiveness of antimicrobial substances on bacterial growth on an agar plate by measuring clear ‘zones of inhibition’.

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The diameter of a clear zone of inhibition around an antimicrobial disc can be measured. The areas of clear zones can be calculated using 𝜋r² and compared to investigate antimicrobial effectiveness. The larger the clear zone of inhibition, the more effective the antimicrobial has been in killing the bacteria. The importance of testing the effectiveness of antimicrobials in clinical settings.

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