M10 Gram -Ve Bacteria 1 Flashcards Preview

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Flashcards in M10 Gram -Ve Bacteria 1 Deck (43):
1

what re the four main gram -ve bac

cocci
curved rods
strict anaerobes
facultative anaerobes

2

what are the two aerobic gram -ve cocci

neisseria
moraxella

3

what is an example of anaerobic gram -ve cocci

veillonella

4

what re some features of neisseira

gram -ve
facultative aerobe
non motile
cocci
pairs, triads, clusters

5

what are the pathogenic neisseria

gonorrhoeae
meningitides

6

what are some oral neisseria

subflava
sicca

7

what is imp about oral neisseria

early tooth colonisers

8

what is n. subflava

most commonly isolated
saccharolytic produces polysac and yellow pigment

9

what is n. sicca

mouth similar to subflava
no pigment prod

10

are n. subflave or n.sicca pathogenic

no

11

what is moraxella

gram -ve bac
neiseira like
asaccharyltic
polysaccharide -ve
Dnase +ve

12

what is the most imp sp of moraxlla

catarrhalis

13

what is moraxella catarrhalis

commensal
pathogen - tonislar b cells causing endocarditis, meningitis

14

what does catarrhalis prod

beta lactamase
complicates Ab therapy

15

what is veillonellla

small gram -ve anaerobic cocci

16

what does veillonella not do

ferment carbs

17

what des veillonella use as energy source

lactic acid --> acetate + 2 propionic acid + CO2 + H20

18

what is the most common strain of veillonell

parvula

19

what kind of bac is parvula

strict anaerobe

20

what does veillonella parvula do

catabolises lactic acid to weaker organic acids - inc pH

21

what bac are present in community acquired pneumonia

moxarella 9.4%
veillionela 1.6%
oral streps 9.4%

22

what are GNABs

gram negative anaerobic Bacilli

23

what re some motile GNABs

selenomas
centipeda
helicobacter

24

what are some non motile GNABs

bacteriodes
porphyromonas
prevotella
(tannerella
fusobac)

25

what is usually prescribed for anaerobic microbes

metronidazole

26

what are selenomonas

-crescent + flagellae
- gram -ve
assc with aggressive periodontitis

27

what are some imp sp of selnomonas

sputigena
noxia

28

what are centipeda

one sp - periodontii
- flagella all round

29

what are helicobacter

H.pylori
assc w/gastritis, peptic ulcers
in dental plaque

30

what kind of bac are bacteriodes

strictly anaerobic gram -v bacilli

31

what is a main sp of bacteriode

fragilis
in mouth
main pathogen

32

what does a healthy gingival crevice contain

Gm +ve cocci

33

below gingival crevice what happens

anaerobic conditions
nutrient from gingival tissues rather than food or saliva

34

what happens in periodontitis

plaque inc = gingivitis
(streptococcus)

plaque between tooth and gum = pocket
(actinomyces )

pocket deep, gingiva recede and bone lost
(porphyromomas gingivalis and prevotella intermedia)

35

what are some other sp of bactericiodes

prevotella
porphyromonas
tannerella forsythia

36

whatarethe common themes of the bacteriodes

asaccharolytic
dark pigment

37

what are some imp features of porphyromonas

dark pigment GNAB
assacharolytic - prod proteases
per pocket
p.gingivalis periodontopathogen

38

what are some imp features of prevotella

dark pigment
saccharolytic
(sucrose --> acetic acid and succinic acid)

39

what doe num of prevotella intermedia correlate with

periodontitis sererity

40

what is prevotella dentalis

non pigmented
from root canals and perio pocket

41

what does black pigmented bac require

iron

42

what is o surface of BPB

porphyrins
with iron but without = photosensitive

43

what is treat BPB with blue light

excitation
prod reactive oxygen species
destroy lipids,protein etc