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Microbiology > Streptococci > Flashcards

Streptococci Flashcards

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Biology 101 flashcards
0
Q

All streptococci are included in the lancefield classification except this

A

Viridans group, s.pneumoniae

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1
Q

Increased co2 for growth

A

Capnophiles

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2
Q

What is the culture in strepto

A

BAP

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3
Q

Biochemical tests in strepto

A

Catalase -

Oxidase -

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4
Q

Produce pus, mostly beta hemolytic

Grow only at 37 degrees

A

Pyogenic group

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5
Q

Grow at 10, 45, 37 degrees

Normal flora of human intestine

A

Enterococcus group

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6
Q

Grow both at 45 and 37 degrees

A

Viridans group

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7
Q

Grow at 10 and 37 degrees

Often found in dairy products

A

Lactic group

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8
Q

Species in enterococcus

A

E.faecalis

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9
Q

Species in pyogenic

A

S.pyogenes, groups a, , and g streptococci

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10
Q

Species in lactic group

A

S.lactis

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11
Q

Species in viridans group

A

S.salivarius, s.mutans, s.mitis

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12
Q

Partial incomplete hemolysis

A

Alpha-hemolytic streptococci

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13
Q

No lysis

A

Gamma hemolytic streptococci
Or
Non hemolytic streptococci

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14
Q

Complete lysis

A

Beta-hemolytic streptocci

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15
Q

Culture in beta hemolytic streptococci

A

Clear area

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16
Q

Culture in alpha hemolytic

A

Green hemolysis

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17
Q

Antigen serogrouping

A

Lancefield classification

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18
Q

She found out the c carbohydrate can be extracted from the streptococcal cell wall

A

Rebecca lancefield

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19
Q

Mostly significant in classifying and identifying beta hemolytic streptococci

A

Lancefield classification

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20
Q

This group is not considerd part of the normal flora

Mot: cough or sneeze

A

Group a strepto

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21
Q

Bacteria considered antigens

A

Clostridium tetani

Bordetella pertusis

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22
Q

Pvf of group a streptococci

A

M-protein

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23
Q

Fever producing bacteria, flesh eating bacteria

A

S.pyogenes

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24
Q

Culturein group a streptococci

A

Well dedined beta hemolysis

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25
Q

Substance that stimulates antibody formation inside the body

A

Antigen

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26
Q

Oxygen labile, highly antigenic

Surface hemolysis on bap

A

Streptolysin o

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27
Q

Produce only by pyogenes

A

Streptolysin O

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28
Q

This test detects recent infection with s.pyogenes

A

Anti streptolysin O

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29
Q

Responsible for surface hemolysis on BAP

Oxygenstable, nonatigenic

A

Streptolysin s

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30
Q

Lowers viscosity of exudates

A

DNAse

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31
Q

This enzymes causes lysis of fibrin clots

Binds to plasminogen

A

Streptokinase

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32
Q

Formerly known as erythrogenic toxins

Degrades proteins, mediates rash in scarlet fever

A

Pyrogenic toxins

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33
Q

Exotoxins are

Endotoxins are

A

Gram +

Gram -

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34
Q

Strep throat are caused by

A

S.pyogenes

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35
Q

This infection Appears initially on the neck

A

Scarlet fever

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36
Q

Strawberry colored tongue

A

Scarlet fever

Scarlatina

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37
Q

Susceptibility test in scarlet fever

A

Dick’s test

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38
Q

Dignostic test in SF

A

Schultz charlton

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39
Q

Postive result in scarlet fever in the diagnostic test

A

Blanching phenomenon

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40
Q

Similar to cockroach bite

A

Cellulitis

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41
Q

Defined areas of redness

A

Erythema

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42
Q

Accumulation of fluid

A

Edema

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43
Q

Spreading infection of subcutaneous skin tissue

A

Cellulitis

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44
Q

Produce redness

A

Rashes

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45
Q

What are the complications of strep throat

A

Rheumatic fever

Bright’s disease

46
Q

Inflammation of the heart, joints, and blood vessels

A

Rheumatic fever

47
Q

Inflammatory disease of the renal glomeruli

A

Bright’s disease

48
Q

Screening test or presumptive test

A

Bacitracin

49
Q

Concentration in taxo A

A

0.04 units

50
Q

+ result of taxoA

A

Any zone of inhibition

51
Q

Helpful in identifying group A streptococci in throat cultures

A

Bacitracin

52
Q

+ result in SXT

A

Resistant (group a and b streptococci)

53
Q

Purpose of pyr test

A

Detects pyrase or pyrolidonyl arylamidase enzyme

54
Q

Only beta hemolytic streptococcus that is

Pyr +

A

S.pyogenes

55
Q

+ result in pyr test

A

Bright/cherry red color

56
Q

Reagent used in pyr test

A

0.01% of cinnamaldehyde

57
Q

Other pyr test + organisms

A

Enterococcus
Aerococcus
Gemella

58
Q

Part of normal flora of the female genital tract and lower GIT

A

Group B streptococci

59
Q

Mot of group B streptococci

A

Unwashed hands of mother

60
Q

Species in group b streptococci

A

S.agalactiae

61
Q

C
A
M
P

A

Christie, atkins, munch, petersen

62
Q

Virulence factor of group b streptococci

A

Capsule

63
Q

Reagent in camp test

A

Beta lysin disk

64
Q

+ result of camp test

A

Bowtie appearance

65
Q

S. Agalactiae possess this enzyme

A

Hippuricase

66
Q

Reagents in hippurate hydrolysis test

A

Sodium hippurate + ninhydrin

67
Q

+ result of hippurate hydrolysis test

A

Purple color

68
Q
  • result of hippurate
A

No color change

69
Q

End product of hippurate

A

Sodium benzoate

70
Q

Main source of streptokinase

A

Group c streptococci

71
Q

Inner greenish

Outer clear

A

Alpha prime

72
Q

S.mitis group

A

Subacute bacterial endocarditis

73
Q

Dental carries

A

S. Mutans group

74
Q

L
A
P

A

Leucine amino peptidase

75
Q

Reagent in growth in be medium

A

Esculin + 1-4% bile salt

76
Q

+ result in growth in be medium

A

Black color

77
Q

6.5% nacl result

A

Negative

78
Q

Pyr test result

A

Negative

79
Q

Penicillin test result

A

Susceptible

80
Q

They possess the group D antigen

A

S.bovis group, enterococci

81
Q

Best specimen for isolation of s.bovis group

A

Blood culture

82
Q

Formerly known as group d streptococci

A

Enterococci

83
Q

Most common isolate in enterococci

A

E.faecalis

84
Q

Natural inhabitants of the intestinal tracts of humans and animals

A

Enterococci

85
Q

Normal flora of intestinal

A

E.faecalis

86
Q

Similar properties of bovis and enterococci

A

Group d

+ be agar test

87
Q

Viridans can also be + in BE because of this

A

Bovis

88
Q

This is only + in LAP test

A

Viridans

89
Q

Supports all growth of bacteria

A

Thioglycollate

90
Q

Utilized for vaginal or rectal swabs

A

Carrot broth, granada agar

91
Q

Color of uninoculated BE

A

Yellow

92
Q

Designed to streptococcus agalactiae

A

Carrot broth or granada agar

93
Q

Sign of any bacterial growth

A

Turbidity

94
Q

Has a characteristic of sweet odor of honeysuckle or butterscotch

A

S.anginosus group

95
Q

Reagent of catalase test

A

3% hydrogen peroxide

96
Q

Result of catalase test

A

Negative (without bubble formation)

97
Q

Detects acetoin production

A

Voges proskauer test

98
Q

+ lap

A

Streptococcus, viridans streptococci

99
Q
  • lap
A

Aerococcus

Leuconotos

100
Q

+ VP

A

Anginosus group

101
Q

End product vp

A

Acetoin

102
Q

Also known as diplococcus

A

S.pneumoniae

103
Q

PVF in s.pneumoniae

A

Capsular polysaccharide

104
Q

Complication of nose and throat infections

A

Otitis media

105
Q

Rust tinged sputum

A

Lobar pneumonia

106
Q

Predisposing factors of lobar pneumonia

A

Alcoholism
Anesthesia
Malnutrition

107
Q

Young colonies

A

Dome shaped

108
Q

Old colonies

A

Coin with a raised rim

109
Q

Standard size of a disk

A

6 mm

110
Q

Antimicrobial susceptibility test

A

Optochin susceptibility
Or
P disk test

111
Q

Capsular swelling test

A

Neufeld quellung reaction

112
Q

+ result of dicks test

A

Erythema

Microbiology (10 decks)

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