You need to know that the various antibiotic drugs are not all equally effective in controlling the bacteriagrowth. Take for example the Staphylococcus aureus. Different antibiotic drugs can have different effects. The most effective antibiotic drug against that bacteria is Penicillin, because it controlled the growth of the bacteria the most. A second example is the Streptococcus penumoniae. With that bacetria the antibiotic drug that was the most effective was the Erythromycin. A third example is Hemophilus influenza. With this one the Erythromycin antibiotic drug is also the most effective. Have in mind that the smaller the diameter correlates with the effectiveness of controlling the bacterial growth. Some of the bacteria growth was stopped by antibiotic drugs, and some weren’t.
