L31. Oral Biofilms

Question 1

Describe the life cycle of a parasite in 5 stages

Answer 1

1. Enters/attaches to host
2. multiplication in host
3. causes harm
4. released from host
5. dissemination and transmission

Question 2

What is a biofilm?

Answer 2

Where bacterial populations adhere to surfaces and interfaces.

Question 3

In a microscope, green bacteria and red bacteria each indicate what?

Answer 3

Green =alive

red = dead

Question 4

How much of human infection is through the biofilm?

Answer 4

60%

Question 5

What biological property allows bacteria to communicate?

Answer 5

Short chain fatty acid release

Question 6

Do all organisms grow in the same region of the oral cavity?

Answer 6

No they choose different regions

Question 7

What is planktonic bacteria?

Answer 7

Free-floating bacteria which attaches to the enamel and creates a micro-colony. This develops into a mature biofilm.

Question 8

Describe how a biofilm forms in 5 stages.

Answer 8

1. Adhesion
2. Colonisation
3. Accumulation
4. Complex community
5. Dispersal

Question 9

Give 2 benefits of a biofilm

Answer 9

Protective

Survival in numbers for bacteria

Question 10

Are we sterile at birth?

Answer 10

Yes

Question 11

Where is the mouth is bacteria most commonly found?

Answer 11

Hard tissue
Tongue dorsum
Shedding of soft tissue

Question 12

Describe plaque development in 4 stages

Answer 12

Pioneer colonisation
outgrowth
secondary colonisation
climax community

Question 13

Give the scientific name for Corsodyl

Answer 13

chlorohexidine

Question 14

What is osteomyelitis?

Answer 14

Bone infection

Question 15

Which antibiotic is used to treat staph aureus?

Answer 15

Flucloxacillin

Question 16

Where does staph aureus often colonise?

Answer 16

In the nose

Question 17

What is parotitis?

Answer 17

Parotid gland infection

Question 18

What is staph mucositis?

Answer 18

staph infection of the oral mucosa

Question 19

Give an example of a commensal bacteria

Answer 19

Staph epidermidis