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Streptococcus Flashcards

1
Q

Gram (+) in cocci and chains

A

Streptococcus

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2
Q

Streptococcus motility

A

Non - motile

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3
Q

Streptococcus is non sporeforming: (T/F)?

A

True

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4
Q

Catalase (-), pinpoint colonies

A

Streptococcus

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5
Q

Selective medium of streptococcus

A

PEA (Phenyl Ethyl Alcohol Agar)

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6
Q

Classification based on antigens present on surface

A

Lancefield

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7
Q

Classification based on hemolytic reaction

A

Smith & Brown’s

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8
Q

Classification based on temperature

A

Bergey’s

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9
Q

Lancefield group A

A

S. pyogenes

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10
Q

Lancefield group B

A

S. agalactiae

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11
Q

Lancefield group C

A

S. dysagalactiae
S. equisimilus
S. equisimilis
S. equi
S. zooepidimicus

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12
Q

Lancefield group D

A

Enterococcus
E. faecalis
E. faecium
E. avium
E. ducans

Non enterococcus
S. bovis
S. equinus

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13
Q

Streptococcus that causes colon cancer

A

S. bovis

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14
Q

Alpha hemolytic

A

Streptococcus pneumoniae
Viridans
Group D

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15
Q

Beta hemolysis

A

Lancefield ABCD

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16
Q

Gamma hemolytic

A

Lancefield D

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17
Q

Bergey’s grouping: pus producing streptococcus

A

Pyogenic

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18
Q

Bergey’s grouping: used in making dairy products

A

Lactic

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19
Q

Bergey’s grouping: normal flora of the gut

A

Enterococcus

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20
Q

Bergey’s grouping: normal flora of upper respiratory tract

A

Viridans

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21
Q

Gram (+) diplococci
Lancet shaped
Dome shaped colonies

A

S. pneumoniae

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22
Q

Streptococcus catalase

A

(-)

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23
Q

White pinpoint colonies

A

Streptococcus

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24
Q

Virulence factor of (GA) S. pyogenes

A

M protein

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25
Q

O2 labile, antigenic, anerobic, lytic

A

Streptolysin O

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26
Q

O2 stable, non antigenic

A

Streptolysin S

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27
Q

Causes Scarlet fever

A

S. pyogenes

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28
Q

Toxin that causes Scarlet fever

A

Erythrogenic toxin

29
Q

Bacitracin/Taxo A of S. pyogenes

30
Q

Flesh eating bacteria

A

S. pyogenes

31
Q

Causes impetigo
Pharyngitis
Rheumatic heart dxs
Rheumatic fever
Acute glomerulonephritis (AGN)
Erysipelas
Necrotizing fasciitis

A

S. pyogenes

32
Q

Flesh eating bacteria

A

S. pyogenes

33
Q

Beta hemolytic
Neonatal sepsis
Normal flora of vagina and upper respiratory tract
Pneumonia
Bacteremia

A

S. agalactiae

34
Q

1 cause of neonatal meningitis

Resistant to Taxo A, P and SXT

A

(GB) S. agalactiae

35
Q

Group of Streptococcus that rarely cause disease

A

Group C & D

36
Q

Causes UTI
Pneumonia
Cellulitis

A

Lancefield Group C

37
Q

Group C:
Bacitracin / SXT

38
Q

Test that differentiates Group D from other Strep groups

A

Bile Esculin Hydrolysis Test

39
Q

Medium of Bile Esculin test

A

Bile Esculin Agar (BEA) contains 40% bile and esculin

40
Q

Positive result for Bile Esculin

A

Blackening or brown ppt
(+) Group D streptococcus

41
Q

Enterococci:
6.5% NaCl / PYR

42
Q

Non enterococci:
6.5% NaCl / PYR

43
Q

Positive result of PYR

A

Red
(+) Group D, Group A (S. pyogenes)

44
Q

Meaning of CAMP test

A

Christine, Atkins, Munch, Peterson

45
Q

Principle of CAMP test

A

CAMP factor enhances beta hemolysis

46
Q

Positive result of CAMP test

A

Arrow head hemolysis
(+) S. agalactiae
(+) H. Pylori
(+) Listeria monocytogenes - no arrow head but w/ hemolysis

*Indicator: S. aureus

47
Q

GA (S. pyogenes):
Bacitracin / SXT

A

(S)(R)
(+) PYRase

48
Q

GB (S. agalactiae):
Bacitracin / SXT

A

(R)(R)
(+) CAMP
(+) Sodium hippurate

49
Q

Group C:
Bacitracin / SXT

50
Q

GD (Enterococcus):
Bacitracin/SXT

A

(R)(R)
(+) BEA
(+) 6.5 NaCl
(+) PYRase

51
Q

GD (Non enterococcus):
Bacitracin/SXT

A

(R)(R)
(+) BEA

52
Q

Norma flora of orpharynx and nasopharynx

A

S. pneumoniae

53
Q

Virulence factor of S. pneumoniae

54
Q

Alpha hemolytic
No Lancefield group
Causative agent of Lobar pneumonia

A

S. pneumoniae

55
Q

1 community acquired pneumonia in the Ph

A

Lobar pneumonia

56
Q

1 cause of adult bacterial meningitis

Most common cause of otitis media

A

S. pneumonia

57
Q

Normal flora of upper respiratory, G.I and Genitourinary tract

58
Q

Alpha hemolytic
No Lancefield group
Cause of subacute bacterial endocarditis

59
Q

Causes dental caries

60
Q

S. pneumoniae:
Inulin fermentation / Bile solubility / Optochin (Taxo P) / Quellung

A

(+)(+)(S)(+)

61
Q

Viridans:
Inulin fermentation / Bile solubility / Optochin (Taxo P) / Quellung

A

(-)(-)(R)(-)

62
Q

Detects pneumococcal antibody; skin test for S. pneumoniae

A

Francis test

63
Q

Detects erythrogenic antigen; skin test for S. pyogenes

A

Dick’s test
(+) Redness

64
Q

Skin test for Scarlet fever

A

Schultz-Charlton test
(+) S. pyogenes - blanching of rash around injection site

65
Q

Require cysteine for survival
Shows satelliting on agar
(+) Staph streak test

A

S. adjacens
Abiotrophia spp.

66
Q

Pediococcus:
Vancomycin / Bile esc / PYR / NaCl / MRS / LAP

A

(R)(+)(-)(+)(-)(+)red

67
Q

Leuconostoc:
Vancomycin / Bile esc / PYR / NaCl / MRS / LAP

A

(R)(+)(-)(+)(+)gas(N/A)

68
Q

Aerococcus:
Vancomycin / Bile esc / PYR / NaCl / MRS / LAP

A

(S)(-/+)(-/+)(+)(N/A)(N/A)

Bacteriology (13 decks)

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