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MCQs

Total Questions : 189 | Page 2 of 19 pages
Question 11. Which of the following is the commonest species of Salmonella for causing zoonotic disease?
  1.    S Indiana
  2.    S newport
  3.    S typhimurium
  4.    S enteritidis
 Discuss Question
Answer: Option C. -> S typhimurium
Answer: (c).S typhimurium
Question 12. Which of the following media is selective for Salmonella?
  1.    Thiosulphate citrate bile salt agar
  2.    Wilson and Blair's brilliant-green bismuth sulphite agar medium
  3.    Bile salt agar
  4.    All of the above
 Discuss Question
Answer: Option B. -> Wilson and Blair's brilliant-green bismuth sulphite agar medium
Answer: (b).Wilson and Blair's brilliant-green bismuth sulphite agar medium
Question 13. Xylose lysine deoxycholate (XLD) agar is better selective medium than the deoxycholate citrate agar (DCA) because
  1.    it is selective
  2.    it imparts better growth
  3.    it contains high salt concentration
  4.    it is less inhibitory to S. Dysentriae and S. flexneri
 Discuss Question
Answer: Option D. -> it is less inhibitory to S. Dysentriae and S. flexneri
Answer: (d).it is less inhibitory to S. Dysentriae and S. flexneri
Question 14. Which of the following serotypes of Salmonella does not produce H2S?
  1.    S choleraesuis
  2.    S paratyphi A
  3.    Both (a) and (b)
  4.    None of these
 Discuss Question
Answer: Option C. -> Both (a) and (b)
Answer: (c).Both (a) and (b)
Question 15. Which of the following property(ies) is/are seen in the members of family Enterobacteriaceae?
  1.    They are catalase-positive
  2.    They are oxidase-negative
  3.    They ferment glucose
  4.    They reduce nitrates to nitrites
 Discuss Question
Answer: Option B. -> They are oxidase-negative
Answer: (b).They are oxidase-negative
Question 16. Which of the following species/subspecies of Klebsiella produce indole?
  1.    K pneumoniae subspecies rhinoscleromatis
  2.    K pneumoniae subspecies aerogenes
  3.    K pneumoniae subspecies pneumoniae
  4.    K oxytoca
 Discuss Question
Answer: Option D. -> K oxytoca
Answer: (d).K oxytoca
Question 17. In Widal test, the significant titre for O agglutinins is generally
  1.    1:50 or more
  2.    1:100 or more
  3.    1:150 or more
  4.    1:2.00 or more
 Discuss Question
Answer: Option B. -> 1:100 or more
Answer: (b).1:100 or more
Question 18. Primarily human pathogenic bacteria is/are ,
  1.    Salmonella typhi
  2.    S paratyphi A
  3.    S paratyphi B
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 19. Which of the following property(ies), shown by the organisms belong(s) to the family Enterobacteriaceae?
  1.    They are catalase-positive
  2.    They are oxidase-negative
  3.    They ferment glucose
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Answer: (d).All of these
Question 20. The bacteria which produce(s) β-galactosidase is/are
  1.    Citrobacter
  2.    Enterohacter
  3.    Serratia
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these

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