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Microbiology Module 1 '15 - '16 > Streptococcus and Related Genera > Flashcards

Streptococcus and Related Genera Flashcards

1
Q

What is the catalase reaction for Staphylococcus?

A

Positive

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2
Q

What is the catalase reaction for streptococcus?

A

Negative

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3
Q

What tests should be set up for Beta streptococci?

A

PYR, Bile esculin, NaCl, CAMP, bacitracin (Catalase)

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4
Q

What tests should you set up for Alpha/Gamma Streptococci?

A

PYR, Bile esculin, NaCl, Optochin (Catalase)

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5
Q

What organism is bacitracin susceptible? *

A

Group A

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6
Q

What organism is optochin susceptible? *

A

Streptococcus Pneumoniae

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7
Q

What organisms are PYR positive? *

A

Group A and Enterococcus

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8
Q

Which organism is bile solubility positive? *

A

Streptococcus Pneumoniae

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9
Q

What is a positive CAMP and what organism produces this? *

A

Arrowhead of hemolysis; Group B

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10
Q

What is a positive bile esculin and what organisms produce this? *

A

Growth and black ppt. Enterococcus or Group D

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11
Q

IF you can not set up a bacitracin, what is an alternative?

A

PYR

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12
Q

IF you can not set up a optochin, what is an alternative?

A

Bile solubility

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13
Q

What group usually has a large zone of Beta hemolysis?

A

Group A

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14
Q

What group usually has a small zone of Beta hemolysis?

A

Group B

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15
Q

What bacteria has a mucoid and dipped appearance?

A

Streptococcus pneumoniae

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16
Q

How do O and S streptomycin act with oxygen?

A

O labile and S stable

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17
Q

What organisms are catalase positive?

A

Staphylococcus

18
Q

What organisms are catalase negative?

A

Streptococci

19
Q

What organism is weakly catalase positive?

A

Enterococcus

20
Q

What organisms are LAP positive? *

A

ALL Streptococci and Enterococci

21
Q

What two organisms are Esulin positive? *

A

Group D and Enterococcus

22
Q

What organism is NaCl positive? *

A

Enterococcus; Group B is variable

23
Q

What organism is PYR positive? *

A

Group A and Enterococcs

24
Q

What organism is Optochin susceptible? *

A

Streptococcus pneumoniae

25
Q

What organism is bile soluble positive? *

A

Streptococcus Pneumoniae

26
Q

What organism is Quelling positive?

A

Sreptococcus Pnemoniae

27
Q

What Organisms are bacitracin susceptible? *

A

Group A

28
Q

What bacteria is CAMP positive? *

A

Group B

29
Q

What bacteria is sodium hippurate positive?

A

Group B

30
Q

What bacteria is Co-aggulation positive (in class)? *

A

Group B

31
Q

What are characteristics and positive results for Group A?

A

Beta hemolysis, PYR +, Bacitracin = S,

32
Q

What are characteristics and positive results for Group B?

A

Beta hemolysis, CAMP +, NaHippurate +, NaCl (usually)

33
Q

What are the characteristics and results of Group D?

A

Alpha or gamma, Esculin +, NaCl and PYR negative

34
Q

What are the characteristics and + results for Streptococcs pneumonia?

A

Alpha hemolytic, Optochin susceptible, Bile solubility positive, and Quelling test +

35
Q

What are enterococcus characteristics and + results?

A

Alpha/Gamma, Esulin, NaCl, PYR positive

36
Q

What are alpha streptococcus (not group D) test results?

A

Negative for alpha strep differentiation

37
Q

What are beta streptococcus (not group A, B, or D) test results?

A

Negative for beta strep differentiation

38
Q

How does lancefield grouping work, what bacteria is it used with mostly?

A

Ag reacted with specific Ab. Beta Streptococci

39
Q

What strep grows on SBA with SXT?

A

Group A

40
Q

What does it mean to be highly specific and low sensitivity?

A

If + than it IS +, hard to detect (takes a lot of organism)

Microbiology Module 1 '15 - '16 (9 decks)

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