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MCQs

Total Questions : 339 | Page 34 of 34 pages
Question 331. What is common in catheters and ventilators?
  1.    They bypass important defenses of the body
  2.    They predispose patients to viral rather than bacterial infections
  3.    They are used primarily in neonatal intensive care units
  4.    Bacteria responsible for associated infections are usually susceptible to antibiotics
 Discuss Question
Answer: Option A. -> They bypass important defenses of the body
Question 332. Lactoferrin helps to protect against pathogens by
  1.    blocking sebum production
  2.    lowering the pH
  3.    facilitating the growth of normal flora
  4.    sequestering Iron
 Discuss Question
Answer: Option D. -> sequestering Iron
Question 333. Which of the following disease is caused by DNA viruses?
  1.    Yellow fever
  2.    Poliomyelitis
  3.    Measles
  4.    Small pox
 Discuss Question
Answer: Option D. -> Small pox
Question 334. The influenza vaccine is administered each year because
  1.    None of these
  2.    mutations in the viral hemagglutinin may allow the virus to evade the immune response elicited by previous vaccines
  3.    it is a polysaccharide vaccine that does not confer long-term protection
  4.    the vaccine is sufficiently toxic to make it necessary to administer only a small amount at any one time
 Discuss Question
Answer: Option B. -> mutations in the viral hemagglutinin may allow the virus to evade the immune response elicited by previous vaccines
Question 335. Which of the following is common in the disease caused by Coryne-bacterium diphtheriae and Bacillus anthracis?
  1.    Both organisms cause skin and respiratory tract infections
  2.    Both organisms are gram-positive spore formers
  3.    The most serious disease symptoms are the direct result of toxin action
  4.    Diphtheria toxin and edema toxin are ADP ribosylating toxins
 Discuss Question
Answer: Option C. -> The most serious disease symptoms are the direct result of toxin action
Question 336. Each of the 3 virulence factors of Bacillus anthracis i.e. the capsule, edema toxin and lethal toxin can affect the activity of
  1.    macrophages
  2.    M cells
  3.    B cells
  4.    ciliated epithelial cells
 Discuss Question
Answer: Option A. -> macrophages
Question 337. Which of the following disease is not caused by microbial protein toxin?
  1.    Diphtheria
  2.    Botulism
  3.    Tuberculosis
  4.    Shigella dysentery
 Discuss Question
Answer: Option C. -> Tuberculosis
Question 338. In the human disease cholera, what is it that actually ends up killing the victim?
  1.    Dehydration and loss of nutrients
  2.    the toxin produced by the bacterium
  3.    Faulty carrier proteins
  4.    Too little water in the food stream
 Discuss Question
Answer: Option A. -> Dehydration and loss of nutrients
Question 339. Fatalities following influenza infection are usually due to the
  1.    damage to the heart muscle
  2.    bacterial superinfection
  3.    formation of granulomas in the lung
  4.    dehydration
 Discuss Question
Answer: Option B. -> bacterial superinfection

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