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MCQs

Total Questions : 48 | Page 3 of 5 pages
Question 21. . Sereny test is used for the detection of
  1.    enteropathogenic Escherichia coli
  2.    enterotoxigenic E. coli
  3.    enteroinvasive E. coli
  4.    verotoxigenic E. coli
 Discuss Question
Answer: Option C. -> enteroinvasive E. coli
Question 22. . Prodigiosin (red pigment) is produced by members of genus
  1.    Hafnia
  2.    Enterobacter
  3.    Serratia
  4.    Cirobacter
 Discuss Question
Answer: Option C. -> Serratia
Question 23. . Verotoxin 1 of Escherichia coli is similar to
  1.    cholera toxin
  2.    shiga toxin
  3.    heat-stable enterotoxin of E. coli
  4.    heat-labile enterotoxin of E. coli
 Discuss Question
Answer: Option B. -> shiga toxin
Question 24. .  Sylvatic plague occurs in
  1.    mice
  2.    squirrels
  3.    chipmunks
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Question 25. . Which of the following serotypes of Salmonella can cause gastroenteritis?
  1.    S enteritidis
  2.    S newport
  3.    S typhimurium
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 26. . Which of the following determine the pathogenicity of Yersinia pestis?
  1.    V and W antigens
  2.    F1 envelope antigen
  3.    Production of pigmented colonies on haemin containing media
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 27. . In Yersinia pestis, capsule is best demonstrated in cultures grown at
  1.    25°C
  2.    29°C
  3.    37°C
  4.    45°C
 Discuss Question
Answer: Option C. -> 37°C
Question 28. .  Enterobacter can be differentiated from Klebsiella by
  1.    ornithine positivity
  2.    motility
  3.    both (a) and (b)
  4.    none of these
 Discuss Question
Answer: Option C. -> both (a) and (b)
Question 29. . Which of the following can readily kill Salmonellae?
  1.    Moist heat at 55°C for 20 min
  2.    Moist heat at 55°C for 10 min
  3.    Moist heat at 55°C for 30 min
  4.    Moist heat at 55°C for 1 hr
 Discuss Question
Answer: Option D. -> Moist heat at 55°C for 1 hr
Question 30. . Traveller's diarrhea is caused by
  1.    enteropathogenic Escherichia coli (EPEC)
  2.    entero invasive E. coli (EIEC)
  3.    entero toxigenic E. coli (ETEC)
  4.    entero haemorrhagic E. coli (EHEC)
 Discuss Question
Answer: Option C. -> entero toxigenic E. coli (ETEC)

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