Antibiotics Neomycin Gentamicin Vancomycin Ampicillin Bacitracin Erythromycin Penicillin G Streptomycin Chloramphenicol Disc content 30 mcg 10 mcg 30 mcg 10 mcg 10 units 15 mcg 10 units 10 mcg 30 mcg Diameter of zone of inhibition (mm) Resistant (mm Intermediate or less) 12 12 14 13 8 13 14 11 12 (mm) 13-16 13-14 15-16 14-16 9-12 14-22 12-14 13-17 Sensitive (mm or more) 17 15 17 17 13 23 15 15 18 ibrary ⒸHudzicki pog mpy CENTIMETERS LINCHES 22. Given the data (above) what can you conclude about using chloramphenicol to treat an infection caused by this microbe? A. the microbe is resistant B. this drug should be used only if there are no better options C. the microbe is sensitive to the drug D. cannot use this drug E. any zone of inhibition shows that a drug will be an effective treatment

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