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Odontogenic infection microbiology — NDEB AFK MCQ

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HardEndodonticsOdontogenic infection microbiologyNDEB AFK

A patient with a spreading odontogenic infection has foul-tasting drainage from a necrotic mandibular molar. Culture would be expected to show mixed flora. What is the most likely cause/mechanism?

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Correct answer: C — Polymicrobial infection with anaerobic predominance

Spreading odontogenic infections from necrotic teeth are typically polymicrobial with a strong anaerobic component. A pure viral or sterile process would not explain purulent foul drainage from a necrotic molar. The pearl is that drainage and removal of the source are central because antibiotics penetrate poorly into undrained abscess cavities.

Reference: Oral microbiology references; BCCDC antimicrobial stewardship