BACTERIOLOGY STRUCTURE Flashcards

1
Q

what are the different shapes of bacteria?

A

cocci (sphere)
bacillus (rod)
spirochete

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2
Q

what are the arrangements of the cocci bacteria?

A

pairs and singles
chains
clusters

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3
Q

what are the arrangements of the bacillus bacteria?

A

pairs and singles
chains
flagellated bacilli

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4
Q

what are the arrangements of the spirochete bacteria?

A

borrelia
treponema
spirilla

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5
Q

what is the significance of the capsules for bacteria?

A
  • adherence
  • inhibition of phagocytosis like opsonization especially for respiratory tract
  • antigenicity like polysaccharides and proteins
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6
Q

what is the importance of the cell wall?

A
cell shape 
environmental survival 
phagocytic recognition 
staining reactions
antigenicity
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7
Q

what part of the cell do beta lactam antibiotics affect?

A

cell wall

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8
Q

what is significant of the G+ cell wall structure?

A

pentaglycine cross-link via 3-4 between L-Lys and D-Ala

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9
Q

what is significant of the G- cell wall structure?

A

direct cross-link via 3-4 between L-DAP and D-Ala

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10
Q

why is bactoprenol important?

A

its a lipid protein that flips and builds onto growing peptidoglycan layer

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11
Q

why is techoic acid important?

A

it keeps the peptidoglycan layer from floating around

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12
Q

this drug binds to the amino acid side chain of NAM molecules, interfering with peptidoglycan synthesis?

A

vancomycin

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13
Q

this drug interferes with the formation of the peptide side chains between adjacent strands of peptidoglycan by inhibiting penicillin binding proteins?

A

B-lactam drugs

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14
Q

this drug interferes with the transport of peptidoglycan precursors across the cytoplasmic membrane, affecting the bactoprenol?

A

bacitracin

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15
Q

this is a type of beta lactam with sulfabactam blocking penicillinase activity?

A

tazobactam

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16
Q

beta lactam antibiotics work by interfering with cell wall synthesis thus they are considered?

A

bacteriostatics

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17
Q

important component of the gram positive cell wall?

A

wall teichoic acid

lipoteichoic acid

18
Q

important component of the gram negative cell wall? which one is the endotoxin?

A

lipopolysaccharide made of O polysaccharide and lipid A

lipid A

19
Q

what are the components of the acid fast bacteria?

A

mycolic acid

arabinogalactan

20
Q

name the stain?

positive staining
negative staining

A

simple staining

21
Q

name the stain?

gram staining
acid staining
spore staining

A

differential staining

22
Q

name the stain?

capsule staining
flagella staining

A

special staining

23
Q

describe the motion of the flagellum?

A

propeller like motion

24
Q

describe the motion of the cilia?

A

back and forth beating

25
what is the function of the bacterial pili?
adherence | transfer of genetic material
26
name for this type of flagellum? single flagellum
mono-trichous
27
name for this type of flagellum? a tuft of flagella found at one of the cell poles
lopho-trichous
28
name for this type of flagellum? single flagellum found at each of the two opposite poles
amphi-trichous
29
name for this type of flagellum? multiple flagella found at several locations about the cell
peri-trichous
30
what are the basic components of the bacterial flagellum?
``` whip like filament a motor complex hook that connects them proto filaments bundles held by a cap motor complex made of rings anchoring the flagellum ```
31
mycobacterium tuberculosis M. Leprae M. Smegmatis Nocardia-actinomycete all these bacterium have this?
Mycolic acids (acidic)
32
procedure for acid fast cell wall ID?
carbol fuchsin (basic) with heat acid alcohol (decolorizer) methylene blue
33
implications of general flagella movements?
response to attractants | movement in body fluids
34
what is this means of genetic information? a process of horizontal gene transfer by which some bacteria take up foreign genetic material (naked DNA) from the environment.
transformation
35
what is this means of genetic information? a process of genetic recombination in bacteria in which genes from a host cell (a bacterium) are incorporated into the genome of a bacterial virus (bacteriophage) and then carried to another host cell when the bacteriophage initiates another cycle of infection
transduction
36
what is this means of genetic information? the transfer of genetic material between bacterial cells by direct cell-to-cell contact or by a bridge-like connection between two cells
bacterial conjugation
37
what is the function of the bacterial cell membrane?
semipermeable active transport secretion
38
what is the respiratory activity of the bacterial cell membrane?
energy production occurs TCA enzymes ETChain
39
so if a cell membrane has a significant number of unsaturated fats, what happens to the membrane with increasing temp?
it becomes more fluid
40
prokaryotic ribosome?
50s 30s 70s
41
eukaryotic ribosome?
60s 40s 80s
42
what are the examples of endospores? clinical significance?
bacillus clostridium survive heat, dry, radiation, chemicals