Waec Model Questions Vol1 2018 Biology Question 24

Practice objective / multiple choice question 24 from the 2018 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2018 Biology Objective / Multiple Choice Hard Difficulty
Question 24 WAEC_MODEL_QUESTIONS_VOL1 • 2018 • BIOLOGY • objective

In a disc diffusion test against a clinical isolate of Staphylococcus aureus, the measured inhibition zone diameters are: Antibiotic X - 22 mm, Antibiotic Y - 18 mm, Antibiotic Z - 30 mm. According to CLSI criteria for this organism, a zone diameter ≥20 mm is interpreted as susceptible, 15-19 mm as intermediate, and ≤14 mm as resistant. Identify the antibiotic that is most effective against the isolate and state its susceptibility category.

Answer Options

A. Antibiotic Z - zone 30 mm (intermediate)
B. Antibiotic Y - zone 18 mm (intermediate)
Correct Answer C. Antibiotic Z - zone 30 mm (susceptible)
D. Antibiotic X - zone 22 mm (susceptible)
Correct Answer
C
Correct Option:
Antibiotic Z - zone 30 mm (susceptible)

About This Question

This is Waec Model Questions Vol1 2018 Biology Question 24. It is one of the objective questions from the 2018 Waec Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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