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Microbiology > Lab Exam 2 Positives and Negatives > Flashcards

Lab Exam 2 Positives and Negatives Flashcards

1
Q

What are the two positives for Hemolysis?

A

Alpha and Beta

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2
Q

What does Alpha look like in Hemolysis?

A

Green

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3
Q

What does Beta look like in Hemolysis?

A

Clearing

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4
Q

What is the negative for Hemolysis?

A

Gamma

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5
Q

What does obligate aerobe look like in Thioglycolate?

A

Growth only at the TOP (needs oxygen)

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6
Q

What does facultative anaerobe look like in Thioglycolate?

A

Growth throughout (does NOT need oxygen)

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7
Q

What does a positive result look like for Simmon’s Citrate?

A

TSA slant turns BLUE

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8
Q

What does a negative result look like for Simmon’s Citrate?

A

TSA slant stays GREEN

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9
Q

What does a positive result look like for Catalase?

A

Bubbles are present

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10
Q

What does a negative result look like for Catalase?

A

Bubbles are NOT present

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11
Q

What does a positive result look like for Spirit Blue Plate?

A

Dark blue precipitate around bacteria

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12
Q

What does a negative result look like Spirit Blue Plate?

A

No halo or plate is grey

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13
Q

What is the positive result for SIM-Sulfur?

A

Black

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14
Q

What is the negative result for SIM-Sulfur?

A

Yellow/No color change

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15
Q

What is the positive result for SIM-Indole?

A

Red at the top of the tube

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16
Q

What is the negative result for SIM-Indole?

A

Yellow/No color change

17
Q

What is the positive result for Voges Proskauer?

A

Brick Red

18
Q

What is the negative result for Voges Proskauer?

A

No color change

19
Q

What is the positive result for DNAse?

A

Halo around bacteria

20
Q

What is the negative result for DNAse?

A

No halo around the bacteria

21
Q

What is the positive result for Milk Plate?

A

Halo around bacteria

22
Q

What is the negative result for Milk Plate?

A

No halo around the bacteria

23
Q

What is the positive result for the Starch Plate?

A

Halo around bacteria

24
Q

What is the negative result for the Starch Plate?

A

No halo around the bacteria

25
Q

What is the positive result for Phenylalanine Slant?

A

Green

26
Q

What is the negative result for Phenylalanine Slant?

A

No color change

27
Q

What are the three options for OF Glucose

A

Negative result = Nothing
Oxidative = 1 Green & 1 Yellow
Fermentative = 2 Yellow

28
Q

What is the positive result for Gelatin Stab?

A

Liquid if it stays that way after 15 minutes in the fridge

29
Q

What is the negative result for Gelatin Stab?

A

Solid

30
Q

What is the positive result of the Methyl Red Test?

A

Red

31
Q

What is the negative result for the Methyl Red Test?

A

Yellow/No Color Change

32
Q

What are the two positive options for Nitrate Reduction?

A

A + B = Red & A + B + C = Clear

33
Q

What is the negative result for Nitrate Reduction?

A

A + B + C = Red

34
Q

What is the positive result for the Fermentation Tubes?

A

Yellow (and maybe gas)

35
Q

What is the negative result for the Fermentation Tubes?

A

Pink/Red

36
Q

What is the positive result for Urease?

A

Fuschia Pink (Bright Pink)

37
Q

What is the negative result for Urease?

A

Yellow or Gray (No Change)

38
Q

What is the positive result for Decarboxylation?

A

Purple

39
Q

What is the negative result for Decarboxylation?

A

Yellow or Gray (No Change)

Microbiology (12 decks)

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