Question

Suppose you do the test on a hypothetical Staphyloccocus species with the antibiotics penicillin (P 10) and chloramphenicol (C 30). You record zone diameters of 25mm the chloramphenicol 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?

Answer 1

In an antibiogram, the larger the inhibition halo, the more sensitive bacteria will be to the drug that is exposed, that is why if the halo is 25 mm, it is considered quite wide, so these drugs such as chloramphenicol and amoxicillin affect the bacterial development in marine culture both bactericidal or bacteriostatic.

Both have a 25mm halo, so both would be SAME as specified.

Explication:

suppose that one of the two drugs has a smaller inhibition halo in the culture, that drug will be less effective in treating this bacterium, therefore more would allow its development, on the contrary, the larger halo would be the most effective drug (This is an example for you to understand that the greater the length of the inhibition halo, the greater the efficacy of the drug, and the lower the halo, the less efficacy)