Microorganisms and Disease problems
- 1. What is common in catheters and ventilators?
Options- A. They bypass important defenses of the body
- B. Bacteria responsible for associated infections are usually susceptible to antibiotics
- C. They predispose patients to viral rather than bacterial infections
- D. They are used primarily in neonatal intensive care units Discuss
Correct Answer: They bypass important defenses of the body
- 2. The toxins produced by bacteria
Options- A. kill viruses
- B. encourage bacterial reproduction
- C. interfere with physiological processes in the body
- D. all of the above Discuss
Correct Answer: interfere with physiological processes in the body
- 3. Which of the following is common in the disease caused by Coryne-bacterium diphtheriae and Bacillus anthracis?
Options- A. Both organisms are gram-positive spore formers
- B. Diphtheria toxin and edema toxin are ADP ribosylating toxins
- C. The most serious disease symptoms are the direct result of toxin action
- D. Both organisms cause skin and respiratory tract infections Discuss
Correct Answer: The most serious disease symptoms are the direct result of toxin action
- 4. Pseudomembraneous colitis is
Options- A. precipitated by the use of certain antibiotics
- B. caused by a gram-positive bacterium
- C. caused by a spore-forming bacterium
- D. all of the above Discuss
Correct Answer: all of the above
- 5. Which of the following characteristic of the Rotavirus was important for the construction of the Rotashield vaccine?
Options- A. The possession of a segmented RNA genome
- B. A limited number of capsule types
- C. The ability of monkey Rotavirus strains to cause serious illness (diarrhea) in human beings
- D. The ability of the Rotavirus to be transmitted faster Discuss
Correct Answer: The possession of a segmented RNA genome
- 6. A major difference between EHEC and EPEC is
Options- A. EHEC secretes a Shiga-like toxin and EPEC does not
- B. EHEC possesses a type III secretion system and EPEC does not
- C. EPEC rearranges host cell actin and EHEC does not
- D. EPEC passes through the placenta to infect the fetus and EHEC does not Discuss
Correct Answer: EHEC secretes a Shiga-like toxin and EPEC does not
- 7. Mucus helps in protecting against pathogens by
Options- A. lowering the pH
- B. facilitating the growth of normal flora
- C. blocking access and attachment of pathogens to mucosal surfaces
- D. sequestering Iron Discuss
Correct Answer: blocking access and attachment of pathogens to mucosal surfaces
- 8. Fatalities following influenza infection are usually due to the
Options- A. dehydration
- B. bacterial superinfection
- C. damage to the heart muscle
- D. formation of granulomas in the lung Discuss
Correct Answer: bacterial superinfection
- 9. Which of the following statements is not true regarding Mycobacterium tuberculosis and/or the disease it causes?
Options- A. The pathogen contains mycolic acid in its cell wall
- B. The pathogen can live inside macrophages
- C. Antibodies to the pathogen are protective
- D. None of these Discuss
Correct Answer: Antibodies to the pathogen are protective
- 10. Immunization with which of the following toxoid induces high titer serum antibody, but does not protect from the corresponding disease?
Options- A. Tetanus
- B. Botulism
- C. Diphtheria
- D. Shigellosis Discuss
Correct Answer: Botulism
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