The Bacterial Species Staphylococus Aureus Is Found on the Skin

question 90

Multiple Choice

The bacterial species Staphylococus aureus is found on the skin and in the nasal passages of about 20% of the human population. In healthy individuals, S. aureus is benign (does not cause harm) in these locations. However, if it is introduced into the bloodstream through, for example, a wound, it can make a person gravely ill. Thus, the ecological relationship of S. aureus with a human:

• A)can be mutualistic or antagonistic.
• B)is always antagonistic.
• C)is always mutualistic.
• D)is fixed or unchanging.
• E)is benign.

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