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Microbiology And Immunology > Gram Positive Bacteria - Coccus > Flashcards

Gram Positive Bacteria - Coccus Flashcards

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Biology 101 flashcards
1
Q

Describe the cell wall of the gram positive bacteria

A

Thick, multilayered cell wall composed of peptidoglycan

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2
Q

Peptidoglycan is importance for what

A

Maintaining the structure of cell
Replication
Survival of bacteria at hostile environments

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3
Q

What are other components of the cell wall

A

Techoic acid
Lipotechoic acid
Complex polysaccharides

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4
Q

Explain techoic acid

A
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5
Q

Explain lipotechoic acid

A
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6
Q

Complex polysaccharides also called what

A

C polysaccharides

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7
Q

What are coccus categorized into based on their arrangement

A

Cluster - Staphylococcus
Chains - Streptococcus

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8
Q

What are the three types of staphylococcus

A
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9
Q

How can Staphylococcus and Streptococcus be differentiated ?

A
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10
Q

What are the tests used for staphylococcus identification

A
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11
Q

Staphylococcus aureus is present where

A
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12
Q

What are the lab characteristics of staphylococcus aureus

A
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13
Q

What does virulence factors of staphylococcus aureus include ?

A

Capsule
Peptidoglycan
Protein A
Toxins
Enzymes

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14
Q

Capsule inhibits what

A

Chemotaxis
Phagocytosis

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15
Q

Explain peptidoglycan as the virulence factor of staphylococcus aureus

A
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16
Q

Explain protein A as virulence factor of staphylococcus aureus

A

Inhibit antibody mediated clearance

17
Q

Give the type of toxins in terms of virulence factor is staphylococcus aureus

A

Exfoliative toxins
Enterotoxins
Toxic Shock Syndrome Toxin-1

18
Q

Explain the enzymes as the virulence factor is staphylococcus aureus

A
19
Q

Staphylococcus epidermidis is present as what

A

Normal flora (commensal)

20
Q

What does the lab characteristics of staphylococcus epidermidis include

A
21
Q

What is the virulence factor of staphylococcus epidermidis

A

Much lower pathogenicity and rarely causes disease in healthy individuals

22
Q

Most streptococcus are what

A

Facultative anaerobes

23
Q

How do streptococcus grow

A

Some only grow in atmosphere enhanced with CO2 (capnophilic growth)

24
Q

What are the lab characteristics of streptococcus pyogenes

A
25
Q

What are the virulence factors of streptococcus pyogenes

A

Capsule
Lipothecoic acid
M protein
Pyrogenic exotoxins
Streptolysin S
Streptolysin O
Streptokinase
DNAase

26
Q

Explain the virulence factor of lipothecoic acid in streptococcus pyogenes

A

Binds to epithelial cells

27
Q

Explain the virulence factor of M protein in streptococcus pyogenes

A

Adhesion
Antiphagocytic

28
Q

What does pyrogenic exotoxins cause

A

High temperature

29
Q

Explain the virulence factor of Streptolysin in streptococcus pyogenes

A

Lyses of : Leukocytes Platelets Erythrocytes
Stimulates release of lysosomal enzyme (non-immunologic)

30
Q

Explain the virulence factor of Streptolysin O in streptococcus pyogenes

A
31
Q

Explain the virulence factor of streptokinase in streptococcus pyogenes

A

Lyses blood clot
Can be used in myocardial infraction

32
Q

Explain the virulence factor of DNAase in streptococcus pyogenes

A
33
Q

What is streptococcus pneumonia

A
34
Q

What are the lab characteristics of streptococcus pneumonia

A
35
Q

What are the virulence factors of streptococcus pneumonia

A
36
Q

What is viridan streptococci

A

Colonizes oropharynx

Microbiology And Immunology (10 decks)

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