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PBD II Exam 2 - Micro Made Easy > Micro - Bacteria II > Flashcards

Micro - Bacteria II Flashcards

1
Q

catalase

A

breaks down hydrogen peroxide

to water and O2

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2
Q

peroxidase

A

breaks down H2O2

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3
Q

superoxide dismutase

A

breaks down superoxide radicals

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4
Q

obligate aerobes

A

have all enzymes

use glycolysis, TCA cycle, ETC and ox phos

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5
Q

facultative anaerobes

A

are aerobic, but can grown in absence of O2 using fermentation

have catalse and superoxide dismutase

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6
Q

microaerophilic bacteria

A

use fermentation

-can tolerate low oxygen because they have SOD

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7
Q

obligate anaerobes

A

no enzymes

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8
Q

gram positive obligate anaerobes

A

clostridium

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9
Q

gram negative obligate anaerobes

A

bacteriodes

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10
Q

gram negative microaerophilic

A

spirochetes

campylobacter

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11
Q

phototrophs

A

light as energy source

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12
Q

chemotrophs

A

chemical compounds as energy source

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13
Q

autotrophs

A

inorganic sources of energy

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14
Q

heterotrophs

A

use organic sources of energy

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15
Q

fermentation

A

glycolysis

glucose > pyruvic acid + ATP

embden meyerhof pathway

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16
Q

respiration

A

glycolysis
krebs TCA cycle
ETC
ox phos

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17
Q

obligate intracellular organisms

A

must steal ATP from host

chlamydia and rickettsia

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18
Q

flagella

A

protein filament

  • for movement
  • attached to basal body (which spins flagellum)
19
Q

single polar flagella

A

vibrio cholera

20
Q

many peritrichous flagella

A

all around the cell

E. coli
proteus mirabilis

21
Q

no flagella

A

shigella

22
Q

periplasmic flagella

A

spirochetes

23
Q

pili

A

non-motile and shorter

-adherence factors

24
Q

neisseria gonorrhea

A

pili allowing it to attach to cervical cells and buccal cells to cause gonorrhea

25
Q

bordetella pertussis

A

adhesion to ciliated respiratory cells

whooping cough

26
Q

capsules

A

protective cell walls

-simple sugar residues

27
Q

amino acid residue

A

bacillus anthracis

28
Q

india ink stain

A

not taken up by capsule
-so it appears as a halo

used to identify cryptococcus

29
Q

quellung reaction

A

bacteria mixed with Abs for capsule

-causes capsule to swell with water

30
Q

endospores

A

dormant forms of bacteria resistant to environment

in bacillus and clostridium

31
Q

exosporium

A

outer layer of endospore

32
Q

biofilm

A

extracellular polysaccharide network

allows binding - ex. prosthetics

33
Q

staphylococcus epidermidis

A

biofilms on IV catheters and can then lead to bacteremia

34
Q

facultative intracellular organisms

A

survive within cells unharmed

-inhibit phagolysosome-lysosome fusion

35
Q

Listen Sally Yer Friend Bruce Must Leave Now

A 
Listeria monocytogenes
Salmonella typhi
Yersinia
Francisella tulaneris
Brucella
Mycobacterium
Legionella
Nocardium

**facultative intracellular organisms

36
Q

exotoxins

A

released by most gram + and gram - vibrio cholera and E. coli

ex/ anthrax, botulism, tetanus, cholera

37
Q

vibrio cholera

A

gram negative

38
Q

enterotoxins

A

exotoxins that cause GI symptoms

-diarrhea

39
Q

food poisoning

A

bacteria grown in food and release enterotoxin

ingested food causes diarrhea and vomiting less than 24 hours

bacillus cereus
staph aureus

40
Q

pyrogenic exotoxins

A

release cytokines causing rash, fever, TXX

staph aureus
streptococcus pyogenes

41
Q

tissue invasive exotoxins

A

allow bacteria to destroy and tunnel through tissue

42
Q

B H A L

A

binding
holding
action
laser

**exotoxins

43
Q

lipid A

A

part of outer membrane LPS in gram negative

very toxic
-can lead to shock

PBD II Exam 2 - Micro Made Easy (21 decks)

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