Suppose you do this test on a hypothetical Staphylococcus species with the antibiotics penicillin (P-10) and levoflaxacin (L-5). You record identical zone diameters of 25 mm for the levoflaxacin and penicillin disks. Which antibiotic would be more effective against this organism? What does this tell you about comparing zone diameters to each other and the importance of the zone diameter interpretive chart?

Levoflaxacin is the antibiotic which is more effective than penicillin against Staphylococcus species because Staphylococcus species are more resistance to penicillin while not resistance against levoflaxacin antibiotic, so the Levoflaxacin is more effective against Staphylococcus species of bacteria. Levoflaxacin kills about 99.9% of Staphylococcus species so we can say that it is more effective than penicillin.

annyksl annyksl · Answer 2 · 2021-12-02T02:32:08+01:00

The most effective antibiotic would be Levoflaxacin and this would be seen by comparing the diameter zones, which shows why the interpretation of these zones is so beneficial.

We can arrive at this answer because:

Staphylococcus is a genus of bacteria that has been resistant to penicillin since the time penicillin was discovered.

In this case, when applying penicillin to a Staphylococcus culture, the bacterium can reproduce and form large zones in diameter.

Staphylococcus is not resistant to Levoflaxacin and therefore it will form discs with small diameters because it will not be able to reproduce efficiently.

In this case, we can state that the analysis and interpretation of the diameter zones are very important to determine the resistance of bacteria to different types of antibiotics.

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