Periodontics · single question
All of the following bacteria are associated with chronic periodontitis EXCEPT one. Which is the EXCEPTION?
Show answer and explanation
Correct answer: D. Streptococcus intermedius
- A. Fusobacterium nucleatum is a key bridging species in periodontal biofilm development and is associated with periodontitis.
- B. Porphyromonas gingivalis is a red complex pathogen and one of the most significant pathogens in chronic periodontitis.
- C. Treponema denticola is a red complex spirochete strongly associated with chronic periodontitis.
- D. CORRECT. Streptococcus intermedius (part of the Streptococcus milleri group) is primarily associated with abscesses and endodontic infections, NOT with the red/orange complex pathogens of chronic periodontitis. It is an early colonizer of healthy gingival sulcus but not a key periodontal pathogen.