The Resident Oral Microflora

Question 1

What types of the streptococcus?

Answer 1

1-alpha (majority, partial haemolysis)
2-beta( complete haemolysis )
3-gama( non haemolysis)
All viridans streptococci

Question 2

Whar types of viridans streptococci ?

Answer 2

1-S.mutans
2-S.salivarius
3-S.anginosus
4-S.mitis

Question 3

Why S.mutans opportunistic pathogen?

Answer 3

Because cause endocarditis

Question 4

S.mutans cause?

Answer 4

Enamel caries

Question 5

9 serotypes of S.mutans?

Answer 5

a-h and k

c,e,f and k most commonly

Question 6

S.sobrinus serotypes?

Answer 6

d and g

Question 7

What extra cellular soluble and insoluble polysaccharides from S.mutans ?

Answer 7

Mutan( highly soluble)
Fructan
Glucan ( only from streptococcus mutans )
From sucrose

Question 8

What acidic fermintation produce from S.mutans ?

Answer 8

Lactate

Question 9

S.salivarius opportunistic pathogen

True or false ?

Answer 9

False

Question 10

S.salivarius and S.vistibularis produce extracellular polysaccharides
True or false

Answer 10

False

Question 11

S.salivarius and S.vestibularis products?

Answer 11

Urease

H2O2

Question 12

Anginosus group important cause of ?

Answer 12

Serious , purulent diseases

Maxillofacial infections

Question 13

Why Anginosus group opportunistic pathogen

Answer 13

Cause abscesses in internal organs (brain and liver)

appendicitis, peritonitis, meningitis, endocarditis

Question 14

S.intermedius produce protein toxin , name and affects?

Answer 14

Intermedilysin

Affect neutrophil function

Question 15

Both S.sanguinis and S.gordonii produce?

Answer 15

• glucan from sucrose
• amonia from arginine
• S.sanguinis produce protease (IgA clevage )
• S.gordonii bind with a-amylase (breakdown starch)

Question 16

What S.oralis produce ?

Answer 16

• neuraminidase ( remove sialic acid from salivary mucins )

* IgA protease

Question 17

S.oralis bind with a-amylase ?

Answer 17

False

Question 18

*S. parasanguinis bind with a-amylase?

Answer 18

True

Question 19

S.parasanguinis produce extra cellular polysaccharides from sucrose?

Answer 19

False

Question 20

S. parasanguinis hydrolysis arginine?

Answer 20

True

Question 21

S. parasanguinis hydrolysis urea?

Answer 21

False

Question 22

What advantage of S.pneumonia?

Answer 22

transfer antibiotic resistance genes among mitis members