How does Propionibacterium acnes cause acne in humans?

Propionibacterium acnes (now commonly called Cutibacterium acnes) normally lives on human skin. When it grows in a clogged hair follicle, it can contribute to inflammation and acne. Choice B correctly describes the bacteria’s presence on skin and its role in clogged pores; acne is not typically spread through close contact with another person.

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