Streptococcus Quiz

Question 1

T or F: The genus Streptococcus is a collection of gram-positve cocci typically arranged in pairs or chains.

Answer 1

True

Question 2

Match the streptococcus classification scheme with the correct description:

1. Serologic properties
2. Hemolytic patterns
3. Complete hemolysis
4. Incomplete hemolysis

A. Lancefield groupings A, B, C, F & G
B. Alpha hemolytic
C. Beta hemolytic
D. Alpha, beta, gamma

Answer 2

1. A
2. D
3. C
4. B

Question 3

T or F: It is practical to think of the streptococci in two groups. The beta hemolytic streptococci which are classified by Lancefield grouping, and the alpha and gamma hemolytic streptococci referred to collectively as viridans streptococci.

Answer 3

True

Question 4

Which statement about the classification of S. pyogenes is correct?

A) An alpha hemolytic group A strep
B) A beta hemolytic group A strep
C) A beta hemolytic group B strep
D) Strep viridans

Answer 4

B

Question 5

Which statement is most correct about the classifications of streptococcus pneumoniae?

A) Beta hemolytic lancefield group P
B) Alpha hemolytic lancefield group D
C) Alpha hemolytic strep; encapsulated usually arranged in pairs
D) Lancefield group A strep

Answer 5

C