Question

250 Topic 21: Infectious Diseases (Genitourinary System)
WE
Mannitol salt agar is selective for Staphylococcus aureus because this
Select one:
O a. can withstand high salt concentration.
O b. is unique in its ability to ferment mannitol.
Oc. is often resistant to methicillin.
O d. can tolerate brief exposures to high temperature.
e. can synthesize catalase.
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Answer 1

Final answer:

Mannitol salt agar selects for Staphylococcus aureus by inhibiting susceptible bacteria with salt and using mannitol for differentiation through color change.

Explanation:

Mannitol salt agar is selective for Staphylococcus aureus because it contains a high salt concentration that inhibits the growth of bacteria susceptible to osmotic stress. Additionally, the medium contains mannitol, which is a fermentable substrate for some bacteria, allowing differentiation based on color change. Therefore, the correct answer is: O a. can withstand high salt concentration.

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