Question

You measure the zone of inhibition around a tetracycline disk as 19 mm. How would you report the susceptibility of this organism to tetracycline?

A. Intermediate
B. Resistant
C. Susceptible
D. Indeterminant

Answer 1

The organism's susceptibility to tetracycline is indicated by the measured zone of inhibition around the tetracycline disk, which is 19 mm.

So the correct answer is C. Susceptible

Step-by-step explanation:

In a standard disk diffusion test, the zone of inhibition serves as a crucial indicator of an organism's susceptibility to an antibiotic. In this case, the substantial 19 mm zone of inhibition around the tetracycline disk suggests that the organism is responsive to tetracycline.

The larger the zone of inhibition, the more effective the antibiotic is against the organism. Therefore, the measurement of 19 mm leads to the conclusion that the organism is susceptible to tetracycline, making it an appropriate choice for treatment against this particular pathogen.

The correct answer is Option C. Susceptible