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

Difficulty level: Hard .

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