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Streptococci Flashcards

(94 cards)

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1
Q

Classification of streptocci based on temperature requirement

A

Academic/Bergey’s classification

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2
Q

Pyogenic bacteria temperature requirement

A

37 C

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3
Q

Viridans temperature requirement

A

37 C or 45 C

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4
Q

Enterococcus temperature requirement

A

10 C, 37 C, 45 C

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5
Q

Lactic group temperature requirement

A

10 C, 37 C

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6
Q

Classification of bacteria based on hemolytic patterns

A

Smith and Brown Classification

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7
Q

Green hemolysis

A

Alpha hemolysis

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8
Q

Clear zone of hemolysis

A

Beta hemolysis

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9
Q

No hemolysis

A

Gamma hemolysis

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10
Q

Based on the extraction of C Carbohydrate from the streptococcal cell wall

A

Lancefield Classification (Rebecca Lancefield)

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11
Q

Beta hemolytic, Group A

A

S. pyogenes

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12
Q

Beta hemolytic, Group B

A

S. agalactiae

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13
Q

Beta hemolytic, Group C

A

S. dysagalactiae subsp. equisimilus, S. equi

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14
Q

Alpha / Gamma hemolytic, Group D

A

S. bovis

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15
Q

Alpha/Beta/Gamma hemolytic Group D

A

Enterococci

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16
Q

Alpha hemolytic, No Lancefield Classification

A

S. pneumoniae

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17
Q

Fever producing bacteria

A

S. pyogenes

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18
Q

Flesh-eating bacteria

A

S. pyogenes

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19
Q

Principal virulence factor of Group A strep

A

M Protein

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20
Q

Oxygen labile hemolysin of Group A

A

Streptolysin O

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21
Q

Oxygen stable toxin of Group A

A

Streptolysin S

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22
Q

Hemolysin responsible for subsurface hemolysis on BAP

A

Streptolysin O

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23
Q

Hemolysin responsible for the surface hemolysis on BAP

A

Streptolysin S

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24
Q

Formerly known as erythrogenic toxins

A

Pyrogenic Toxins

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25
Cysteine protease which mediates rash in scarlet fever
Exotoxin B
26
Specimen for group A strep
Throat Swab
27
Causative agent of Strep Throat or Pharyngitis
Group A strep
28
Strawberry-colored tongue
Scarlet Fever
29
Susceptibility Test for Scarlet Fever
Dick's Test
30
+ result in Dick's Test
Erythema or redness of the test site
31
Diagnostic Test for Scarlet Fever
Schultz Charlton (Anti-erythrogenic Toxin)
32
Positive result in Schultz-Charlton Test
Blanching Phenomenon (Rash Fade)
33
Causative agent of Necrotizing Fasciitis/Galloping Gangrene
S. pyogenes
34
Also known as Bright's disease
Acute Glomerulonephritis
35
Post-streptococcal sequelae (Group A)
AGN Rheumatic Fever
36
4 confirmatory tests for Strep
1. lancefield test 2. Fluorescent Ab Test 3. PHADEBACT 4. Neufeld Quellung Test (S. pneumoniae)
37
Normal flora of the female genital tract and lower GIT
Group B strep
38
Causative agent of Neonatal Meningitis
Group B strep (S. agalactiae)
39
Virulence factor of Group B strep
Sialic Acid
40
Positive result in CAMP test
Arrow head B hemolysis or bowtie appearance
41
Reagents for Hippurate Hydrolysis Test
Sodium hippurate and Ninhydrin
42
Positive result in Hippurate Hydrolysis Test
Purple Color
43
Negative control in CAMP test
Enterococci
44
Reagent in CAMP test
B-lysin-producimg strain of S. aureus or B-lysin disk
45
Most common cause of SBE
Viridans strep
46
Most commonly isolated viridans strep
S. mutans
47
a.k.a wide zone hemolysis | Colonies are surrounded by a very small zone of no hemolysis and then a wider zone of B-hemolysis
Alpha-prime hemolysis
48
Most common isolate of enterococci
E. faecalis
49
Reagent in Bile Esculin test
Esculin + 1-4% bile salt
50
+ result in bile esculin medium
Black color complex in the agar
51
Positive result in 6.5% NaCl test
Turbidity
52
E. faecalis growth factor requirement
Cyanocobalamin (B12)
53
Carrot broth is a selective broth for
S. agalactiae
54
Has a characteristic "sweet odor of honeysuckle or butterscotch" when grown in high concentration or pure culture
S. anginosus group
55
Catalase test result when colonies are taken from BAP
False +
56
Positive result in LAP test
Red color
57
Reagent in VP Test
5% alpha naphthol | 40% KOH
58
Diplococcus streptococci
S. pneumoniae
59
Causative agent of Lobar pneumonia
S. pneumoniae
60
Most common cause of Adult Meningitis
S. pneuomoniae
61
Virulence factor of S. pneumoniae
Capsular polysaccharide
62
Appearance of S. pneumoniae microscopically
Lancet-shaped
63
"Coin with a raised rim" | Dimple-shaped/donut-shaped colonies
Old colonies of S. pneumoniae
64
"Dome-shaped" colonies
Young colonies of S. pneumoniae
65
Streptococcus causing Otitis Media
S. pneumoniae
66
Presumptive test for S. pneumoniae
Taxo P/Optochin susceptibility test
67
Reagent for Taxo P
Ethylhydroxycuprein hydrochloride
68
Positive result in Taxo P
> or = 14mm
69
Confirmatory test for S. pneumoniae which detects the activity of amidase
Bile solubility
70
Reagent in Bile Solubility Test
Sodium desoxycholate (bile salt)
71
+ result in bile solubility test
No turbidity
72
Formerly known as nutritionally variant streptococci (NVS)
Abiotrophia | Granulicatella
73
Bacitracin (S) PYR (+) SXT (R)
S. pyogenes
74
CAMP (+) Hippurate HOH (+) SXT (R)
Group B strep
75
SXT (S)
Group C, F, and G | Rodriguez book: Also S. pneumoniae and Viridans
76
``` Gamma hemolytic Bile esculin(+) ```
Group D strep
77
Alpha hemolytic Optochin (S) Bile solubility (+)
S. pneumoniae
78
Alpha hemolytic Optochin (R) Bile solubility (-)
S. viridans
79
Growth i. 6.5% NaCl (+)
Enterococci
80
PYR (+)
Group A strep and Group D enterococci
81
Bile solubility reagent on BAP and positive result
``` 10% sodium desoxycholate Lyzed colony (+) ```
82
Bile solubility reagent in tube and positive result
2% sodium desoxycholate | Clear (+)
83
Test to differentiate S. viridans from Pediococcus/Leuconostoc
Vancomycin Resistance Test S. viridans (S)
84
MRS Broth test (+) result
Gas formation (+) Leuconostoc spp (-) Pediococcus
85
Thrombolytic drug for AMI from strep
Streptokinase
86
#1 cause of Impetigo
S. pyogenes
87
Causative agent of Puerperal Sepsis and Childbed Fever
S. pyogenes
88
Microscope used in Todd Hewitt Broth
Fluorescence microscope
89
Nosocomial pathogen
Enterococcus
90
CA of Colon Cancer
S. bovis
91
#1 normal flora of the mouth/oral cavity
Viridans streptococci
92
CA of SBE due to dental procedure
S. sanguis
93
Test to differentiate Enterococcus (+) from Pediococcus (-)
PYR Test
94
``` Requires Vit. B6 (Pyridoxine) Staph streak (+) ```
NVS Nutritionally Variant Strep (Abiotrophia and Granulicatella)

Microbiology (9 decks)

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