Hi. I am doing an investigation on the effects of different antibiotics on Gram positive and Gram negative bacteria.(adsbygoogle = window.adsbygoogle || []).push({});

1) Can you say that antibiotics and bacteria form a chaotic system? Can a very small change in concentration of antiboitics, or a small variation in pH, change the diameter of killing zone greatly?

2) If I want to extend this investigation: not only testing effects of antibiotics on Gram positive and Gram negative bacteria, but also "mycoplasmas" which are neither Gram positive nor negative. Is this possible? (I do not actually have to carry this out but just need to propose what needs to be done). Before I used the Mann Whitney U Test to comparing two sets of data. But if I introduce mycoplasmas, which statistical tests are there to comparing three groups of data?

Thank you very much for your help in advance.

Gary

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# Different antibiotics on Gram positive and Gram negative bacteria

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