Neco Model Questions Vol1 2018 Biology Question 18
Practice objective / multiple choice question 18 from the 2018 Neco Model Questions Vol1 Biology examination.
In a disc diffusion test a researcher measures zones of inhibition of 14 mm, 22 mm and 18 mm for antibiotics A, B and C respectively against a bacterial strain. The standard interpretive criteria for this organism are: susceptible if zone ≥ 20 mm, intermediate if 15 mm ≤ zone ≤ 19 mm, resistant if zone ≤ 14 mm. The agar depth used was 4 mm instead of the standard 5 mm, which increases zone diameters by approximately 10 % compared with the standard depth. Adjust the measured zones to the standard depth and state the susceptibility category for each antibiotic.
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This is Neco Model Questions Vol1 2018 Biology Question 18. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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