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MCQs

Total Questions : 31 | Page 3 of 4 pages
Question 21.  Coagulase-reacting factor is necessary for
  1.    slide coagulase test
  2.    tube coagulase test
  3.    precipitation test
  4.    none of these
 Discuss Question
Answer: Option B. -> tube coagulase test
Question 22.  Bacteria which produces coagulase is
  1.    S epidermidis
  2.    S saprophyticus
  3.    S aureus
  4.    S hominis
 Discuss Question
Answer: Option C. -> S aureus
Question 23. . The toxin of Staphylococcus aureus that may result into scalded skin syndrome is
  1.    Enterotoxin
  2.    Leucocidin
  3.    Epidermolytic toxin
  4.    Haemolysin
 Discuss Question
Answer: Option C. -> Epidermolytic toxin
Question 24. . The bacteria which can ferment mannitol anaerobically is
  1.    Staphylococcus aureus
  2.    S epidermidis
  3.    S saprophyticus
  4.    None of these
 Discuss Question
Answer: Option A. -> Staphylococcus aureus
Question 25.  Which of the following Staphylococcal haemolysins does not cause lysis of human RBCs?
  1.    β haemolysin
  2.    γ haemolysin
  3.    α haemolysin
  4.    δ haemolysin
 Discuss Question
Answer: Option C. -> α haemolysin
Question 26.  Staphylococcal food poisoning usually manifests itself following ingestion of contaminated food after
  1.    2-6 hours
  2.    8-12 hours
  3.    12-18 hours
  4.    18-36 hours
 Discuss Question
Answer: Option A. -> 2-6 hours
Question 27. . The most common cause of cystitis (after Escherichia coli) in healthy sexually active women is
  1.    Staphylococcus saprophyticus
  2.    Proteus mirabilis
  3.    Pseudomonas aeruginosa
  4.    Klebsiella pneumoniae
 Discuss Question
Answer: Option A. -> Staphylococcus saprophyticus
Question 28. . Protein A is found in cell wall of
  1.    coagulase-negative staphylococci
  2.    Staphylococcus aureus
  3.    Micrococci
  4.    none of these
 Discuss Question
Answer: Option B. -> Staphylococcus aureus
Question 29. . Which of the following can be used to detect clumping factor?
  1.    tube coagulase test
  2.    slide coagulase test
  3.    precipitation test
  4.    none of these
 Discuss Question
Answer: Option B. -> slide coagulase test
Question 30. . Most strains of Staphylococcus aureus indicate
  1.    phosphatase production
  2.    a golden-yellow pigment
  3.    β-haemolysis on sheep blood agar
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above

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