The microbiology lab was able to isolate one of the organisms from Tara’s blood. Using a Kirby-Bauer test (disk diffusion assay), they assessed the organism for antibiotic resistance. The first column of numbers shows the size of the zone of inhibition (ZOI) in millimeters (mm). The remaining columns show the values needed to define the organism as "resistant," "intermediate," or "susceptible" to that antibiotic. Based on these data, which antibiotic(s) would not be an appropriate choice for treatment? Select all that apply. (NCLEX-HESI-TEAS style)
Kirby-Bauer Assay
Measured
ZOI (mm) R I S
Amoxicillin 25 ≤28 - ≥29
Ciprofloxacin 25 ≤15 16-20 ≥21
Erythromycin 23 ≤13 14-22 ≥23
Gentamicin 16 ≤12 13-14 ≥15
Rifampin 26 ≤16 17-19 ≥20
Tetracycline 18 ≤14 15-18 ≥19
Rifampin
Tetracycline
Erythromycin
Ciprofloxacin
Amoxicillin
Gentamicin
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The microbiology lab was able to isolate one of the organisms from Tara’s blood. Using a Kirby-Bauer...
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