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Microbiology Objective Questions { Streptococcus  }

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
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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
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3. Which of the following condition is non-suppurative sequelae of Streptococcus pyogenes infections?
A.Acute rheumatic fever
B.Acute glomerulonephriti
C.Erythema nodosum
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
D.Vascular intima
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5. Streptococcus pyogenes can be differentiated from other haemolytic Streptococci on the basis of
A.Bacitracin sensitivity
B.Erythromycin sensitivity
C.Aminoglycosides sensitivity
D.Penicillin sensitivity
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6. Streptolysin O is
D.all of these
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7. Cell wall protein of Streptococcus pyogenes crossreacts with human
A.synovial fluid
B.cardiac valves
D.vascular intima
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