Exam 4 Chapter 23

  1. Which of the following is an organ of the gastrointestinal tract?

    C) the esophagus
  2. Where in the digestive tract does the absorption of water take place?

    A) the large intestine
  3. Which of the following is a fungus which commonly lives in the large intestine?

    A) Candida
  4. Streptococcus mutans is associated with

    D) dental caries
  5. Porphyromonas gingivalis is associated with

    A) perodontitis
  6. Which of the following is now known to be the cause of most peptic ulcers?

    C) Helicobacter pylori
  7. Urease is an important virulence factor of which of the following?

    B) Helicobacter pylori
  8. The most important virulent factor of Vibrio cholerae is

    A) its ability to produce a potent exotoxin
  9. The major symptoms of cholera are attributable to which of the following?

    D) activation of adenylate cyclase
  10. Which of the following serotypes of Salmonella enterica causes most cases of human salmonellosis in the United States?

    E) both Enteritidis and Typhimurium
  11. Which of the following is a defining characteristic of coliforms?

    C) They ferment lactose
  12. Escherichia. coli O157:H7 is primarily associated with which of the following foods?

    E) ground beef
  13. The most common cause of traveler's diarrhea is

    A) Escherichia coli
  14. Shigellosis can be differentiated from salmonellosis by the fact that Shigella

    C) multiplies in the host cell's cytosol
  15. The most common bacterial cause of diarrhea that sends people to doctors in the United States is

    B) Campylobacter
  16. A young woman being treated for serious burns develops severe diarrhea accompanied by intense abdominal pain. She passes several watery, foul-smelling, bloody stools a day. A colonoscopy reveals patches of yellowish lesions in the large intestine. The probably causative agent is

    C) Clostridium difficile
  17. The common source of contamination in the majority of cases of staphylococcal food poisoning (intoxication) is

    C) the skin of food preparers
  18. Which of the following statements is TRUE with regard to oral herpes?

    D) Lesions can be triggered by emotional stress or physiologic changes.
  19. Which of the following is the major sign or symptom of mumps?

    C) parotitis
  20. The viruses responsible fo the majority of infant deaths resulting from diarrhea in the world are the 

    B) rotaviruses
  21. Which of the following hepatitis viruses usually produces subclinical infections?

    A) HCV
  22. The intracellular parasite usually acquired in contaminated drinking water which causes a persistent watery diarrhea is 

    E) Cryptosporidium parvum
  23. Which of the following conditions usually results in severe acute liver damage?

    E) co-infection with hepatitis B and hepatitis delta viruses
  24. A vaccine is available against which of the following?

    D) both hepatisis A and hepatitis B
  25. Of the following, who is most likely to develop a chronic infection with hepatitis B virus?

    D) newborns
  26. A man reports to his doctor that he is tired all the time and his urine has become darker in color. He has not experienced fever or vomiting recently. The physician notes that his eyes are yellowing and his abdomen is swollen. The man has a history of kidney transplant and recently returned from an overseas trip. The man may be infected with

    C) hepatitis E virus
  27. Diagnosis of hepatitis B infection is made by the observation of which of the following in the patient's body fluids?

    A) Dane particles
  28. Which of the following is a notable symptom of giardiasis?

    B) foul-smelling "rotten egg" stools
  29. Which of the following causes "beaver fever?"

    B) Giardia intestinalis
  30. Which of the following statements is TRUE with regard to Entamoeba histolytica?

    B) it causes pseudopodia to attach to the intestinal lining
  31. Where in a tapeworm would you expect to find fertilized eggs?

    A) at the end of the strobila
  32. Tapeworms are usually transmitted to humans through ingestion of

    D) cysticerci
  33. Differentiation between Taenia saginata and Taenia solium is carried out via examination of the

    C) scolex
  34. Which of the following is a common childhood parasite in the United States?

    E) Enterobius vermicularis
  35. What is the primary symptom of Enterobius infections?

    D) perianal itching
  36. A large number of people in a community experience diarrhea with fever. Public health authorities investigate and find that the people are passing dark urine, and some have yellowish skin. Furthermore, all of the affected individuals recently ate at a new restaurant in town known for its wide variety of fresh imported vegetables. Which of the following is the most likely causative agent?

    C) hepatitis A virus
  37. The DNA virus known as "serum hepatitis" is

    B) HBV
  38. Peritonitis may develop in severe cases of

    B) typhoid
  39. What member of the human intestinal microbiota occasionally causes life-threatening disease?

    C) Clostridium difficile
  40. Accessory organ infections are caused by

    A) mumps virus
  41. Cholera toxin is composed of five A subunits and one B subunit
    A) True
    B) False
    B) False
  42. Salmonella is part of the normal microbiota of virtually all vertebrates except humans.
    A) True
    B) False
    A) True
  43. Cholera toxin is composed of five A subunits and one B subunit.
    A) True
    B) False
    B) False
  44. All tapeworms are intestinal parasites that completely lack digestive systems
    A) True
    B) False
    A) True
  45. omplete recovery from hepatitis A infection occurs 99% of the time.
    A) True
    B) False
    A) True
  46. Vomiting is a common sign of viral gastroenteritis.
    A) True
    B) False
    B) False
  47. Peptic ulcers are erosions of the lining of the small or large intestines.
    A) True
    B) False
    B) False
  48. Dysentery is a severe type of gastroenteritis in which stools contain mucus and blood.
    A) True
    B) False
    A) True
  49. Supportive care is the only treatment for staphylococcal food poisoning.
    A) True
    B) False
    A) True
  50. Contamination of meat with tapeworm cysts can be detected by visual inspection.
    A) True
    B) False
    A) True
Card Set
Exam 4 Chapter 23
Exam 4 Chapter 23