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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
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
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
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
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
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