This graph shows the hardest to kill bacteria and the easiest to kill bacteria. From this graph we can see that Aerobact is the hardest to kill with the highest MIC value combined. The easiest to kill bacteria is on the bottom. This bacteria is Brucella An. It has the lowest MIC combined.
Notice how the data shows that penicilin has a MIC value of less than 1. This means for all the positve cases or gram stains, penicilin is the most effective antibiotic.
Notice in this graph how Penicilin is the highest MIC value for negative Stains. This means that Penicilin is the least effective if there is a negative stain. This then leads us to see that Neomycin is the most effective for negative stains.