Biofilm

Question 1

What us Veillonella ?

Answer 1

Veillonella :

Small Gram -ve anaerobic cocci

• Mouth and dental plaque
• Up to 20% of plaque flora Veillonellae

Turns Lactic Acid → acetate + 2 propionic acid + CO2 + H2O

which arent as good at leading to demineralisation of tooth surface.

Question 2

What is Bacteriocin?

Answer 2

Bacteriocin: A substance released by one bacteria that kills another usually by inducing a metabolic block.

Substance normally a protein

Normally active against same species can extend to closely related species

Question 3

What is Quorum Sensing?

Answer 3

The process in which single-celled organisms monitor their population density by detecting the concentration of small, diffusible signal molecules produced by the cells themselves.

Question 4

What is Specific Plaque Hypothesis?

Answer 4

Loesche, 1976

Specific Plaque Hypothesis” states that dental caries was an infection with specific bacteria in the dental plaque of which the most relevant were Streptococcus mutans and lactobacilli