Spirochacter and Enterobacteriaceac problems
- 1. Verotoxin 1 of Escherichia coli is similar to
Options- A. cholera toxin
- B. shiga toxin
- C. heat-stable enterotoxin of E. coli
- D. heat-labile enterotoxin of E. coli Discuss
Correct Answer: shiga toxin
- 2. Which of the following determine the pathogenicity of Yersinia pestis?
Options- A. V and W antigens
- B. F1 envelope antigen
- C. Production of pigmented colonies on haemin containing media
- D. All of these Discuss
Correct Answer: All of these
- 3. In Yersinia pestis, capsule is best demonstrated in cultures grown at
Options- A. 25°C
- B. 29°C
- C. 37°C
- D. 45°C Discuss
Correct Answer: 37°C
- 4. The most common cause of urinary tract infection in the community is
Options- A. Klebsiella pneumoniae
- B. Proteus vulgaris
- C. Escherichia coli
- D. Citrobacter freundii Discuss
Correct Answer: Escherichia coli
- 5. The agent(s) which can cause plague is/are
Options- A. Yersinia pestis
- B. Proteus mirabilis
- C. Pseudomonas aeruginosa
- D. All of these Discuss
Correct Answer: Yersinia pestis
- 6. The bacteria that is negative for fermentation of mannitol is
Options- A. S flexneri
- B. S boydii
- C. S dysenteriae
- D. S sonnei Discuss
Correct Answer: S dysenteriae
- 7. Spirochaetes exhibit
Options- A. corkscrew-like rotatory movement
- B. flexion and extension motility
- C. translatory motion
- D. all of the above Discuss
Correct Answer: all of the above
- 8. Which of the following serotypes of Salmonella can cause gastroenteritis?
Options- A. S enteritidis
- B. S newport
- C. S typhimurium
- D. All of these Discuss
Correct Answer: All of these
- 9. Which of the following can readily kill Salmonellae?
Options- A. Moist heat at 55°C for 20 min
- B. Moist heat at 55°C for 10 min
- C. Moist heat at 55°C for 30 min
- D. Moist heat at 55°C for 1 hr Discuss
Correct Answer: Moist heat at 55°C for 1 hr
- 10. Transmission of bubonic plague is by
Options- A. rat flea
- B. inhalation
- C. ingestion
- D. all of these Discuss
Correct Answer: rat flea
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