Periodontics · single question

The microflora deep within a mature periodontal pocket is predominantly composed of:

  1. Strict (obligate) anaerobes
  2. Strict aerobes
  3. A single bacterial species
  4. Only facultative aerobes
Show answer and explanation

Correct answer: A. Strict (obligate) anaerobes

  • A. Correct. Subgingival/periodontal pockets are low-oxygen and favor strict anaerobes (e.g., Bacteroidaceae, spirochetes) in periodontal disease.
  • B. Strict aerobes require oxygen and cannot dominate the deep, low-oxygen pocket.
  • C. Periodontal infections are polymicrobial, not a single species.
  • D. Facultative organisms exist but obligate anaerobes predominate deep in the pocket.

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