Electron microscopic examination of the bacterial flora of necrotising ulcerative gingivitis indicates the presence of microorganisms within non-necrotic tissues in advance of other bacteria. The organisms involved are______________?
Correct answer: B. Spirochetes
- A. Cocci
- B. Spirochetes
- C. Bacteriophages
- D. Filamentous rods
Explanation
Spirochetes, especially Treponema species, can penetrate non-necrotic tissue in advance of other organisms during necrotising ulcerative gingivitis. Their spiral shape and motility help them invade tissue.
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