Microbiology 15

  1. The most frequently used portal of entry for pathogens is the




    B)
  2. The ability of some microbes, such as Trypanosoma or Giardia to alter their surface molecules and evade destruction by the host's antibodies is called




    C)
  3. Most pathogens that gain access through the skin




    E)
  4. The ID50 is




    B)
  5. All of the following contribute to a pathogen's invasiveness EXCEPT




    C)
  6. Which of the following statements is FALSE?




    E)
  7. Which of the following statements about exotoxins is generally FALSE?




    B)
  8. Endotoxins are




    C)
  9. Which of the following is NOT a membrane-disrupting toxin?




    E)
  10. Cytopathic effects are changes in host cells due to




    A)
  11. Which of the following does NOT contribute to the symptoms of a fungal disease?




    C)
  12. All of the following are methods of avoiding host antibodies EXCEPT




    C)
  13. Siderophores are bacterial proteins that compete with the host's




    B)
  14. The fimbriae of Neisseria gonorrhea and enteropathogenic E. coli are examples of




    B)
  15. All of the following are examples of entry via the parenteral route EXCEPT




    D)
  16. Superantigens produce intense immune responses by stimulating lymphocytes to produce




    E)
  17. Botulism is caused by ingestion of a proteinaceous exotoxin; therefore, it can easily be prevented by




    E)
  18. All of the following organisms produce exotoxins EXCEPT




    D)
  19. Which of the following cytopathic effects is cytocidal?




    C)
  20. All of the following are used by bacteria to attach to host cells EXCEPT A) M protein.
    B) ligands.
    C) fimbriae.
    D) capsules.
    E) A-B toxins.
    E
  21. Symptoms of protozoan and helminthic diseases are due to




    D)
  22. Which of the following statements about staphylococcal enterotoxin is FALSE?




    A)
  23. Which of the following contributes to the virulence of a pathogen?




    D)
  24. Lysogenic bacteriophages contribute to bacterial virulence because bacteriophages




    D)
  25. Twenty-five people developed symptoms of nausea, vomiting, and diarrhea three to six hours after attending a church picnic where they ate a ham and green bean casserole with cream sauce. The most likely cause of this case of food intoxication is




    C)
  26. Which of the following statements about M protein is FALSE?




    B)
  27. Symptoms of intense inflammation and shock occur in some gram-positive bacterial infections due to




    B)
  28. Which of the following is an example of direct damage due to bacterial infection?




    E)
  29. Polio is transmitted by ingestion of water contaminated with feces containing polio virus. What portal of entry does polio virus use?




    B)
  30. All of the following bacteria release endotoxin EXCEPT




    A)
  31. Cholera toxin polypeptide A binds to surface gangliosides on target cells. If the gangliosides were removed,




    E)
  32. Bacteria such as E. coli and Salmonella produce invasins that bind host cells, thus causing the cells to




    D)
  33. Which of the following mechanisms is used by gram-negative bacteria to cross the blood-brain barrier?




    D)
  34. Injectable drugs are tested for endotoxins by




    B)
  35. Endotoxins in sterile injectable drugs could cause




    A)
  36. Gram-negative septic shock results from the following events. What is the second step?




    C)
  37. Antibiotics can lead to septic shock if used to treat




    B)
  38. Which of the following is NOT a cytopathic effect of viruses?




    C)
  39. Table 15.1
    Staphylococcus aureus   Wound    <10
    Staphylococcus aureus   Wound + Ampicillin   300
    Table 15.1 shows the ID50 for Staphylococcus aureus in wounds with and without the administration of ampicillin before surgery. Based on the data, the administration of ampicillin before surgery




    C)
  40. Table
    15.2
    Bacterium   ID50
    E. coli O157:H7   20
    Legionella pneumophila   1
    Shigella   10
    Treponema pallidum   57
    40) Which organism in Table 15.2 most easily causes an infection?




    C)
  41. Which organism in Table 15.2 causes the most severe disease?
    Table 15.2
    Bacterium   ID50
    E. coli O157:H7   20
    Legionella pneumophila   1
    Shigella   10
    Treponema pallidum   57





    E)
  42. Bacteria that cause periodontal disease have adhesins for receptors on streptococci that colonize on teeth. This indicates that




    A)
  43. Nonpathogenic Vibrio cholerae can acquire the cholera toxin gene by




    E)
  44. In response to the presence of endotoxin, phagocytes secrete tumor necrosis factor. This causes




    C)
  45. Patients developed inflammation a few hours following eye surgery. Instruments and solutions were sterile, and the Limulus assay was positive. The patients' inflammation was due to




    D)
Author
Anonymous
ID
319459
Card Set
Microbiology 15
Description
Chapter 15 Tortora
Updated