4. Suppose you do this test on a hypothetical Staphyloccocus species with the an

Question

4. Suppose you do this test on a hypothetical Staphyloccocus species with the antibiotics penicillin (P10) and chloramphenicol (C30). You record zone diameters of 25 mm for the chloramphenicol and penicillin disks. Which antibiotic would be more effective against this organism? What does this tell you about the comparing zone diameters each other and the importance of the zone diameter interpretive chart? 4. Suppose you do this test on a hypothetical Staphyloccocus species with the antibiotics penicillin (P10) and chloramphenicol (C30). You record zone diameters of 25 mm for the chloramphenicol and penicillin disks. Which antibiotic would be more effective against this organism? What does this tell you about the comparing zone diameters each other and the importance of the zone diameter interpretive chart? 4. Suppose you do this test on a hypothetical Staphyloccocus species with the antibiotics penicillin (P10) and chloramphenicol (C30). You record zone diameters of 25 mm for the chloramphenicol and penicillin disks. Which antibiotic would be more effective against this organism? What does this tell you about the comparing zone diameters each other and the importance of the zone diameter interpretive chart?

Explanation / Answer

* Assume that P10 is concentration of penicillin in micrograms/ml and chloramphenicol 30 micrograms/ml (concentrations not clearly specified in question). For both the antibiotis, the zone of inhibition is 25mm. Penicillin, at lower concentration, produced the same inhibitory effect as that of chloramphenicol. Hence, penicillin is more effective.

The zone of inhibition gives a rough idea about the ability of an antibiotic to inhibit the growth of or kill a bacteria.

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