Streptococcus – Section 1

1. The bacteria involved in the production of dental caries is/are

A. Streptococcus mutans
B. S sanguis
C. Both (a) and (b)
D. Streptococcus pyogenes

Correct Answer: C. Both (a) and (b)
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2. Which of the following test indicates the susceptibility to streptococcal pyrogenic exotoxin?

A. Schick test
B. Disk test
C. ASO test
D. Precipitation test

Correct Answer: B. Disk test
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3. Which of the following condition is non-suppurative sequelae of Streptococcus pyogenes infections?

A. Acute rheumatic fever
B. Acute glomerulonephritis
C. Erythema nodosum
D. All of these

Correct Answer: D. All of these
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4. Which of the following cross-reacts with cell wall carbohydrate of Streptococcus pyogenes?

A. Cardiac valves
B. Synovial fluid
C. Myocardium
D. Vascular intima

Correct Answer: A. Cardiac valves
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5. Streptococcus pyogenes can be differentiated from other hemolytic Streptococci on the basis of

A. Bacitracin sensitivity
B. Erythromycin sensitivity
C. Aminoglycosides sensitivity
D. Penicillin sensitivity

Correct Answer: A. Bacitracin sensitivity
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