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MCQs

Total Questions : 26 | Page 2 of 3 pages
Question 11. Crystal violet blood agar is a selective medium for
  1.    Corynebacterium diphtheriae
  2.    Staphylococcus aureus
  3.    β-haemolytic streptococci
  4.    Mycobacterium tuberculosis
 Discuss Question
Answer: Option C. -> β-haemolytic streptococci
Question 12.  The bacteria involved in the production of dental caries is/are
  1.    Streptococcus mutans
  2.    S sanguis
  3.    Both (a) and (b)
  4.    Streptococcus pyogenes
 Discuss Question
Answer: Option C. -> Both (a) and (b)
Question 13.  Which of the following test indicates the susceptibility to streptococcal pyrogenic exotoxin?
  1.    Schick test
  2.    Disk test
  3.    ASO test
  4.    Precipitation test
 Discuss Question
Answer: Option B. -> Disk test
Question 14.  Streptolysin O is
  1.    antigenic
  2.    oxygen-labile
  3.    heat-labile
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Question 15.  Which of the following condition is non-suppurative sequelae of Streptococcus pyogenes infections?
  1.    Acute rheumatic fever
  2.    Acute glomerulonephriti
  3.    Erythema nodosum
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 16.  Cell wall protein of Streptococcus pyogenes crossreacts with human
  1.    synovial fluid
  2.    cardiac valves
  3.    myocardium
  4.    vascular intima
 Discuss Question
Answer: Option C. -> myocardium
Question 17.  Streptococcus pyogenes can be differentiated from other haemolytic Streptococci on the basis of
  1.    Bacitracin sensitivity
  2.    Erythromycin sensitivity
  3.    Aminoglycosides sensitivity
  4.    Penicillin sensitivity
 Discuss Question
Answer: Option A. -> Bacitracin sensitivity
Question 18.  Which of the following cross-reacts with cell wall carbohydrate of Streptococcus pyogenes?
  1.    Cardiac valves
  2.    Synovial fluid
  3.    Myocardium
  4.    Vascular intima
 Discuss Question
Answer: Option A. -> Cardiac valves
Question 19.  Which of the following test(s) may establish retrospective diagnosis of streptococcal infection?
  1.    Anti-DNase B test
  2.    ASO test
  3.    Streptozyme test
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 20. . The bacterial sore throat is caused by
  1.    Staphylococcus aureus
  2.    Haemophilus spp
  3.    Streptococcus pyogenes
  4.    Mycoplasma pneumoniae
 Discuss Question
Answer: Option C. -> Streptococcus pyogenes

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