Viridans streptococci are commonly part of the normal flora of which site?

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Multiple Choice

Viridans streptococci are commonly part of the normal flora of which site?

Explanation:
Viridans streptococci are normal inhabitants of the mouth and upper airway. They colonize the oral cavity, saliva, dental surfaces, and the oropharyngeal mucosa, making the upper respiratory tract their typical resident site. This is why the upper respiratory tract is the best choice. They are not typical residents of skin, the gastrointestinal tract, or the genitourinary tract, where different microbial communities predominate.

Viridans streptococci are normal inhabitants of the mouth and upper airway. They colonize the oral cavity, saliva, dental surfaces, and the oropharyngeal mucosa, making the upper respiratory tract their typical resident site. This is why the upper respiratory tract is the best choice. They are not typical residents of skin, the gastrointestinal tract, or the genitourinary tract, where different microbial communities predominate.

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