M9 Gram +ve Oral Bacteria

Question 1

what are the major genera of Gm +ve oral Bac

Answer 1

Street.cocci
Staph.cocci
actinomyces
lactobacillus
eubacterium

Question 2

what kind of bac is streptococci

Answer 2

facultative and obligate anaerobes

Question 3

what kind f bac is staphylococci

Answer 3

facultative anaerobes

Question 4

what kind of is actinomyces

Answer 4

facultative anaerobes and obligate anaerobes

Question 5

what kind of bac is lactobacillus

Answer 5

facultative anaerobes

Question 6

what kind of bac is eubacterium

Answer 6

obligate anaerobes

isolated from perio disease

Question 7

what is bac CNS

Answer 7

coagulase negative staphylococci

Question 8

what does oral staph pose a risk of

Answer 8

oral disease and cross conamination

Question 9

how much of staphylococcus is MRSA

Answer 9

10%

Question 10

what is the remainder of staphylococcus

Answer 10

90% methicillin sensitive

Question 11

what are the second most important group of ba involved in dental aries

Answer 11

after streptococci

then lactobacilli

Question 12

are lactobacilli gram +ve or -ve

Answer 12

+ve

Question 13

what is the shape of lactobacilli

Answer 13

pleomorphic rods

Question 14

what are lactobacilli like for colonisation

Answer 14

poor adhesion so late colonisers

Question 15

what does the acidogenic and auric properties of lactobacilli mean

Answer 15

survive and reproduce under acid conditions

Question 16

what are the 3 main groups of lactobacilli

Answer 16

homolactic fermenters
heterolactic fermenters
facultative heterolactic fermenters

Question 17

what are homolactic fermenters

Answer 17

produce only lactic acid (>65%)

from sugar

Question 18

what are heterolactic fermenters

Answer 18

equal amounts of lactic acid, acetic acid and CO2

Question 19

what are facultative heterolactic fermenters

Answer 19

normally homolactic fermenters

switch to heterolactic feremntation

Question 20

what are some sp of lactobacilli

Answer 20

casei Gp
acidophilus
fermentum

Question 21

what s lactobacillus case Gp

Answer 21

homofermenter
- rhamnosus
- paracasei
(competes with mutant)

Question 22

what is lactobacillus acidophilus

Answer 22

homofermenter

Question 23

what is lactobacillus fermentum

Answer 23

heterofermenter

Question 24

what caries is lactobacilli assc with

Answer 24

deep carious lesson

low pH

Question 25

what does the level of lactobacilli in saliva correlate with

Answer 25

carb intake

Question 26

the fall of what bac has an impact on lactobacilli

Answer 26

lactobacilli increase as mutant streptococci fall

Question 27

does lactobacilli initiate demineralisation

Answer 27

no | imp in progression when low pH

Question 28

what is a caries susceptibility test

Answer 28

determine cariogenic bac in saliva (s mutans and lacobacilli) used on high risk pt

Question 29

lactobacillus tend to have another function

Answer 29

protective probiotic - rhamnosus - milk - casei and hamnosus reduced s mutans

Question 30

are actinocymes gram +ve or -ve

Answer 30

+ve

Question 31

is actinomyces prominent in the mouth

Answer 31

major proportion of microflora - approximal - gingival crevice

Question 32

how are actinomyces arranged

Answer 32

single pairs short chains clumps

Question 33

how does actinomyces grow

Answer 33

branched network or hyphae not spores

Question 34

what kind of bac is actinomyces

Answer 34

anaerobic or facultative

Question 35

what aids actinomyces adherence and aggregation

Answer 35

fimbriae

Question 36

where in the mouth is actinocyes mostly found

Answer 36

dental plaque | tonsil crypts

Question 37

what is the shape of acinomyces

Answer 37

pleomorphic

Question 38

what are some sep of actinomyces in the mouth

Answer 38

naesludii | odontolyticus

Question 39

what kind of caries usually assc with actinomyces

Answer 39

root surface caries

Question 40

what does a naesludii produce

Answer 40

extracellular slime and fructans for sucrose

Question 41

when are naesludii able to produce disease

Answer 41

when into to a gnotobiotic hamster (sterile)

Question 42

what can naesludii cause

Answer 42

actinomycosis

Question 43

where is a israelii found

Answer 43

mouth dental plaque female genital tract

Question 44

what kind of bac is a israelii

Answer 44

strict anaerobe

Question 45

what does a israelii most likely cause

Answer 45

opportunistic | acitnomycosis

Question 46

what is actinomycosis characteristic pus

Answer 46

thick fluid form sinuses yellow granular 'sulphur granules'

Question 47

what does granules in pus show

Answer 47

pathognomic | indicator of disease

Question 48

what are the sulphur granules

Answer 48

aggregations of actinomyces filaments smell grittiness

Question 49

how much israelii present in actinomyces leisons

Answer 49

>80%

Question 50

what are some co infectors with israelii

Answer 50

haemophilia | propionibacterium

Question 51

what site treatment of actinomycosis

Answer 51

remove original dental focus of infection incision an drain lesion long term antibiotic treatment

Question 52

what si the antibiotic treatment used against actinomycosis

Answer 52

penicillin/amoxycillin - 6 weeks | erythromycin used if allergy

Question 53

what are some chaacretrstics of the eubacterium species

Answer 53

diverse obligate aearbes bacilli - filamentous gram vary

Question 54

what does asaccharolyic mean

Answer 54

able to metabolic sugar for energy

Question 55

what are other gram +ve oral bac

Answer 55

propionibacterium rothia corynebacterium

Question 56

what are propionibacterium

Answer 56

gram +ve non spore forming anaerobes

Question 57

what are the sb groups of propionibacterium

Answer 57

propionicus | acnes

Question 58

what are the propionibacterium propionicus

Answer 58

prod proprionic acid mouth, dental plaque and calculus similar to acitnmyces israelii = actinomycosis

Question 59

what is propionibacterium acnes

Answer 59

inhabit skin acne lesions soft tissue abscess in peril pockets assc with period disease

Question 60

what is rothia dentocariosa

Answer 60

``` progression caries pleomorphic rods long chains supraginigival plaque opportunistic --> endocarditis ```

Question 61

what are the main types of corynebacteria

Answer 61

diphtheria | matruchotii

Question 62

what is corynebacteria matruchotii

Answer 62

assc with dental plaque | initiate calculus children with active caries

Question 63

where is actinomyces most dist

Answer 63

sp assc with higher populations in supra gingival plaque

Question 64

where is propionibacterium most dist

Answer 64

sp similar assc in supra and sub gingival plaque

Question 65

where is eubacterium usually assc

Answer 65

sub gingival plaque | -anaerobic

Question 66

where are streptococci usually dist

Answer 66

genera assc with range of environments