Micro & Immunology · single question
Which organism acts as the key 'bridge' between early and late colonizers in dental plaque biofilm?
Show answer and explanation
Correct answer: C. Fusobacterium nucleatum
- A. S. mutans is an early colonizer associated with caries, not the bridging organism.
- B. P. gingivalis is a late colonizer (red complex) that attaches via the bridge — it is not the bridge itself.
- C. Correct. Fusobacterium nucleatum coaggregates with both early and late colonizers, physically bridging the two communities.
- D. Actinomyces is an early colonizer, not the bridging species.
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