Microbiology Chapter 23: Digestive System Diseases
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Questions and Answers

What is the primary function of the gastrointestinal tract?

  • To grind food into smaller particles
  • To produce digestive secretions
  • To digest food, absorb nutrients and water, and eliminate waste (correct)
  • To provide protection from infection

    • Which of the following is NOT a symptom of bacterial gastroenteritis?

  • Diarrhea
  • Fever
  • Headache
  • Runny nose (correct)

    • What is the primary method of diagnosing tooth decay?

  • Visual inspection (correct)
  • X-ray imaging
  • CT scans
  • Blood tests

    • Which of the following is a risk factor for tooth decay?

    <p>Consuming a diet high in sucrose</p> Signup and view all the answers

    Which of the following is NOT a treatment option for Helicobacter pylori infections?

    <p>Gastric bypass surgery</p> Signup and view all the answers

    What is the primary method of preventing tooth decay?

    <p>Practicing good oral hygiene</p> Signup and view all the answers

    What is the primary entry point for Salmonella to cause bacterial gastroenteritis?

    <p>Small intestine</p> Signup and view all the answers

    What is the main difference between typhoid fever and salmonellosis?

    <p>Caused by different serotypes of Salmonella</p> Signup and view all the answers

    How does Salmonella induce disease in the host?

    <p>By producing toxins that disrupt cellular activities</p> Signup and view all the answers

    What is the primary mode of transmission for typhoid fever?

    <p>Contaminated food and water</p> Signup and view all the answers

    What is the typical outcome for individuals infected with Salmonella?

    <p>Self-limiting illness that resolves on its own</p> Signup and view all the answers

    How is Salmonella diagnosed?

    <p>By detecting Salmonella in stool samples</p> Signup and view all the answers

    Which of the following bacteria causes traveler's diarrhea?

    <p>Escherichia coli</p> Signup and view all the answers

    What is the primary mechanism by which Shigella avoids immune defenses?

    <p>By invading neighboring epithelial cells</p> Signup and view all the answers

    What is the primary virulence factor of Shigella?

    <p>Type III secretion systems</p> Signup and view all the answers

    What is the primary method of treating traveler's diarrhea?

    <p>Fluid and electrolyte replacement</p> Signup and view all the answers

    What is the primary symptom of shigellosis?

    <p>Diarrhea</p> Signup and view all the answers

    What is the primary method of diagnosing shigellosis?

    <p>Symptom-based diagnosis</p> Signup and view all the answers

    Which of the following bacteria is commonly associated with peptic ulcer disease?

    <p>Helicobacter pylori</p> Signup and view all the answers

    What is the primary method of preventing tooth decay?

    <p>Regular brushing and flossing</p> Signup and view all the answers

    What is the primary virulence factor of Escherichia coli?

    <p>Fimbriae</p> Signup and view all the answers

    What is the primary complication of shigellosis?

    <p>Mucosal abscess formation</p> Signup and view all the answers

    What is the primary factor that triggers the activation of Vibrio genes in the human body?

    <p>Human body environment</p> Signup and view all the answers

    What is the most important virulence factor of Vibrio cholerae?

    <p>SEM V</p> Signup and view all the answers

    What is the result of the action of cholera toxin on intestinal epithelial cells?

    <p>Secretion of electrolytes and water</p> Signup and view all the answers

    What is the characteristic of stool in patients with cholera?

    <p>Rice-water-like</p> Signup and view all the answers

    What is the primary treatment for cholera?

    <p>Supportive care and doxycycline administration</p> Signup and view all the answers

    What is the primary source of human infections of Campylobacter jejuni?

    <p>Chickens</p> Signup and view all the answers

    What is the result of the toxins produced by Clostridium difficile in severe cases?

    <p>Pseudomembranous colitis</p> Signup and view all the answers

    What is the primary way to prevent Campylobacter jejuni infections?

    <p>Proper hygiene after handling raw poultry</p> Signup and view all the answers

    What is the primary factor that facilitates the overgrowth of Clostridium difficile?

    <p>Antimicrobial use</p> Signup and view all the answers

    What is the basis of diagnosis for Campylobacter jejuni infections?

    <p>Signs and symptoms</p> Signup and view all the answers

    What is the primary consequence of the unnecessary use of antimicrobials?

    <p>Increased risk of C.difficile infections</p> Signup and view all the answers

    What is the primary function of urease in Helicobacter pylori?

    <p>Neutralization of stomach acid</p> Signup and view all the answers

    What is the outcome of the formation of ulcers due to Helicobacter pylori infection?

    <p>Destruction of epithelial cells and underlying tissue</p> Signup and view all the answers

    What is a common characteristic of bacterial gastroenteritis?

    <p>Similar manifestations despite different causative agents</p> Signup and view all the answers

    What is the primary site of attachment for Helicobacter pylori?

    <p>Epithelial cells in the stomach lining</p> Signup and view all the answers

    What is a symptom of dysentery?

    <p>Frequent loose stools with blood and mucus</p> Signup and view all the answers

    What is a common source of bacterial gastroenteritis?

    <p>Contaminated food and water</p> Signup and view all the answers

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