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Microbiology > Gram Positive Cocci > Flashcards

Gram Positive Cocci Flashcards

1
Q

Staph epidermidis

Gram Stain and Colony descriptions

A

GPC in Loose clusters and in tetrads

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2
Q

Staphylococcus epidermidis

Growth on media

A

Small to medium, Smooth, raised, entire, gray-white

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3
Q

Staphylococcus epidermidis

Tests

A 
Catalase positive
Coagulase negative
Novobiocin Sensitive
DNase negative (no zone of inhibition)
Mannitol fermentation negative (remains pink)
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4
Q

Staph aureus

Gram Stain

A

GPC in clusters

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5
Q

Staph aureus

Growth on media

A

Medium to large, Smooth, raised, entire, golden yellow

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6
Q

Staph aureus

Tests

A 
Catalase pos
Coagulase pos
Gelatin hydrolysis pos
DNase pos
Mannitol fermentation pos (turns yellow)
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7
Q

Staph saprophyticus

Gram Stain

A

GPC in pairs or tetrads

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8
Q

Staph saprophyticus

Growth on media

A

Large, convex, entire, white (can be yellow or orange), glossy

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9
Q

Staph saprophyticus

Tests

A

Catalase pos
Coagulase neg
Novobiocin resistant
Urease pos

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10
Q

Strep pyogenes

Gram Stain

A

GPC in chains

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11
Q

Strep pyogenes

Growth on media

A

Beta hemolytic, grayish-white

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12
Q

Strep pyogenes

Tests

A

Catalase neg
Beta hemolytic
PYR pos
Bacitracin Susceptible

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13
Q

Strep agalactiae

Gram Stain

A

GPC in chains

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14
Q

Strep agalactiae

Growth on media

A

Beta hemolytic, flat, glossy

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15
Q

Strep agalactiae

Tests

A 
Catalase neg
Beta hemolytic 
Hippurate pos
CAMP pos
Carrot broth pos
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16
Q

Strep pneumoniae

Gram Stain

A

GPC, lancet-shaped in pairs, intra or extracellular

17
Q

Strep pneumoniae

Growth on media

A

Alpha hemolytic, small, grey, dimpled, can be mucoid

18
Q

Strep pneumoniae

Tests

A 
Catalase neg
Alpha hemolytic 
Optochin pos (>14mm)
Bile solubility pos
Quellung reaction pos (capsule swells)
19
Q

Alpha Viridans

Gram Stain

A

GPC in long chains

20
Q

Alpha viridans

Growth on media

A

Minute to small, gray, domed, alpha hemolytic

21
Q

Alpha viridans

Tests

A

Catalase neg
Alpha hemolytic
Optochin neg
Bile solubility neg

22
Q

Enterococcus

Gram Stain

A

GPC in short chains and pairs

23
Q

Enterococcus

Growth on media

A

Small, cream or white, entire, gamma hemolytic

24
Q

Enterococcus

Tests

A 
Catalase neg
Gamma hemolytic 
Bile esculin pos
PYR pos
6.5% NaCl pos
25
Q

Group D Strep

Gram Stain

A

GPC

26
Q

Group D Strep

Growth on media

A

Gamma hemolytic

27
Q

Group D Strep

Tests

A 
Catalase neg
Gamma hemolytic 
Bile esculin pos
PYR neg
6.5% NaCl neg

Microbiology (2 decks)

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