E
69 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which shape do Neisseria meningitidis bacteria have?

  • Spiral
  • Rod-shaped
  • Coffee-bean shaped (correct)
  • Round
  • What is the most important virulence factor of Neisseria meningitidis?

  • Lipopolysaccharides (LPS)
  • Phagocytes
  • Proteases
  • Capsule (correct)
  • What is the frequency of asymptomatic Neisseria meningitidis carriers in the healthy population?

  • Between 2% and 30% (correct)
  • Less than 1%
  • Between 10% and 20%
  • Around 5%
  • Which bacterium is the exclusive human pathogen and the ethiological agent of gonorrhea?

    <p>Neisseria gonorrhoeae</p> Signup and view all the answers

    Which strain of Neisseria meningitidis causes meningitis and primarily affects infants younger than 2 years?

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

    Which type of gonorrhea transmission occurs when a mother transmits the bacterium to her newborn during childbirth?

    <p>Vertical route</p> Signup and view all the answers

    Which gram-negative facultative anaerobic rod is lactose positive and commonly found in the healthy intestine?

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

    Which specialized epithelial cells are the site of internalization of S. Typhi?

    <p>M cells</p> Signup and view all the answers

    What is the main reservoir during chronic infection with S. Typhi?

    <p>Gall bladder</p> Signup and view all the answers

    Which Vibrio species is associated with epidemics and pandemics of cholera?

    <p>Vibrio cholerae O1</p> Signup and view all the answers

    What is the causative agent of cholera?

    <p>Vibrio cholerae</p> Signup and view all the answers

    What is the standard first-line therapy for H. pylori?

    <p>Triple therapy consisting of proton pump inhibitors, clarithromycin, and amoxicillin</p> Signup and view all the answers

    What is the primary reservoir for H. pylori?

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

    What is the most common symptom of Salmonella infection?

    <p>Nausea and vomiting</p> Signup and view all the answers

    What is the dose required to give symptomatic disease for Salmonella?

    <p>Between 107 and 108 cells</p> Signup and view all the answers

    What is the causative agent of bacillary dysentery?

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

    Which subgroup of Shigella produces a termolabil eso-toxin (Shiga toxin)?

    <p>Shigella A</p> Signup and view all the answers

    How is dysentery typically contracted?

    <p>Ingestion of contaminated water or food</p> Signup and view all the answers

    What physiological effects can Shiga toxin have on the body?

    <p>Damage to the intestinal epithelial cells</p> Signup and view all the answers

    What is the major route through which pathogenic strains of Escherichia coli cause disease?

    <p>Foodborne transmission</p> Signup and view all the answers

    Which serotype of Escherichia coli is the most common cause of hemorrhagic colitis and hemolytic uremic syndrome?

    <p>E. coli O157</p> Signup and view all the answers

    Which pathogenic group of Escherichia coli strongly and tightly adheres to the intestinal epithelium, causing a reduced absorption of nutrients and resulting in watery diarrhea?

    <p>Enteropathogenic E. coli</p> Signup and view all the answers

    Which Escherichia coli strain is the leading cause of infant diarrhea in developing countries and traveler's diarrhea?

    <p>Enterotoxigenic E. coli</p> Signup and view all the answers

    Which shape do Neisseria meningitidis bacteria have?

    <p>Coffee-bean shaped</p> Signup and view all the answers

    What is the most important virulence factor of Neisseria meningitidis?

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

    What is the frequency of asymptomatic Neisseria meningitidis carriers in the healthy population?

    <p>2-30%</p> Signup and view all the answers

    Which of the following is NOT a common symptom of gonorrhea infection?

    <p>Vaginal discharge</p> Signup and view all the answers

    Which type of Neisseria bacteria is the most common cause of meningitis worldwide?

    <p>Neisseria meningitidis</p> Signup and view all the answers

    What is the primary route of transmission for pathogenic strains of Escherichia coli?

    <p>Ingestion of contaminated food or water</p> Signup and view all the answers

    Which type of Shigella produces a termolabil eso-toxin (Shiga toxin)?

    <p>S. flexneri</p> Signup and view all the answers

    Which of the following is a characteristic of Shigella bacteria?

    <p>They are motile</p> Signup and view all the answers

    What is the incubation period for bacillary dysentery caused by Shigella?

    <p>3-6 hours</p> Signup and view all the answers

    Which subgroup of Shigella produces an exotoxin that can cause kidney failure and coma?

    <p>Shigella A</p> Signup and view all the answers

    What is the most common and important member of the Escherichia genus?

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

    What is the primary site of internalization of S. Typhi in the small intestine?

    <p>M cells</p> Signup and view all the answers

    Which of the following is a common site of secondary infection during systemic infection with S. Typhi?

    <p>Gall bladder</p> Signup and view all the answers

    Which Vibrio species is not associated with epidemics and pandemics of cholera?

    <p>Vibrio parahaemolyticus</p> Signup and view all the answers

    What is the mechanism of action of the cholera toxin produced by V. cholerae?

    <p>It alters the permeability of the mucosal membrane</p> Signup and view all the answers

    Which bacterium is an important cause of acute and chronic gastritis, peptic ulcers, gastric adenocarcinoma, and MALT lymphoma?

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

    What is the standard first-line therapy for H. pylori?

    <p>Triple therapy with proton pump inhibitors, clarithromycin, and amoxicillin</p> Signup and view all the answers

    Which Salmonella strain is the common cause of salmonellosis and is often transmitted through poultry and eggs?

    <p>S. Enteritidis</p> Signup and view all the answers

    What is the sensitivity and specificity range of the breath test used to determine the presence of H. pylori?

    <p>94% to 98%</p> Signup and view all the answers

    Which type of Escherichia coli causes dysentery with blood and pus in the stool?

    <p>Enteroinvasive E. coli</p> Signup and view all the answers

    Which virulence factor of Enterotoxigenic E. coli causes the secretion of sodium, chlore, potassium, bicarbonate and water, outside from cell, in intestines?

    <p>Heat-labile exotoxin</p> Signup and view all the answers

    Which type of Escherichia coli is the leading cause of infant diarrhea in developing countries and traveler's diarrhea?

    <p>Enterotoxigenic E. coli</p> Signup and view all the answers

    What is the major route through which pathogenic strains of Escherichia coli cause disease?

    <p>Fecal-oral transmission</p> Signup and view all the answers

    Which of the following is NOT caused by Neisseria meningitidis?

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

    What is the main route of person-to-person spread of Neisseria meningitidis?

    <p>Aerosolization of respiratory tract secretion</p> Signup and view all the answers

    What is the most important virulence factor of Neisseria meningitidis?

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

    Which bacterium is the exclusive human pathogen and is commonly transmitted through sexual contact?

    <p>Neisseria gonorrhoeae</p> Signup and view all the answers

    What is the most common symptom of gonorrhea in men?

    <p>Penile discharge</p> Signup and view all the answers

    Which strain of Neisseria meningitidis is responsible for most disease cases worldwide?

    <p>Type B</p> Signup and view all the answers

    Which Enterobacteriaceae is lactose positive and commonly found in the healthy intestine?

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

    Which type of Shigella ferments mannitol and includes 15 serotypes?

    <p>Shigella C</p> Signup and view all the answers

    What is the primary cause of dysentery, a disease characterized by diarrhea containing blood, mucus and pus?

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

    Which subgroup of Shigella produces a termolabil eso-toxin (Shiga toxin) that damages intestinal epithelial cells and can cause damage to the kidney and central nervous system?

    <p>Shigella A</p> Signup and view all the answers

    Which type of bacteria is the most common and important member of the Escherichia genus and is commonly found in the lower intestine of humans?

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

    What specialized epithelial cells are the primary site of internalization of S. Typhi in the small intestine?

    <p>M cells</p> Signup and view all the answers

    Which of the following is a common site of secondary infection during systemic infection with S. Typhi?

    <p>Gall bladder</p> Signup and view all the answers

    What is the primary route of transmission for pathogenic strains of V. cholerae?

    <p>Ingestion of contaminated food or water</p> Signup and view all the answers

    What is the most effective antibiotic treatment for S. Typhi infection?

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

    Which bacterium is an important cause of acute and chronic gastritis, peptic ulcers, gastric adenocarcinoma, and MALT lymphoma?

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

    What is the standard first-line therapy for H. pylori?

    <p>A one-week triple therapy of proton pump inhibitors, clarithromycin, and amoxicillin</p> Signup and view all the answers

    What is the most common symptom of Salmonella infection?

    <p>Nausea and vomiting</p> Signup and view all the answers

    What is the dose required to give symptomatic disease in Salmonella infections?

    <p>Between 106 – 108 cells</p> Signup and view all the answers

    Which type of Escherichia coli causes dysentery with blood and pus in the stool?

    <p>Enteroinvasive E. coli</p> Signup and view all the answers

    What is the leading cause of hemorrhagic colitis and hemolytic uremic syndrome?

    <p>Enterohemorrhagic E. coli</p> Signup and view all the answers

    What is the most common cause of infant diarrhea in developing countries and traveler's diarrhea?

    <p>Enterotoxigenic E. coli</p> Signup and view all the answers

    Which virulence factor of Enterotoxigenic E. coli causes the secretion of sodium, chloride, potassium, bicarbonate and water, outside from cell, in intestines?

    <p>Heat-labile exotoxin (LT-1)</p> Signup and view all the answers

    More Like This

    Microbiology STDs and Infections
    37 questions
    Neisseria Meningitidis and Gonorrhoeae Quiz
    25 questions
    Neisseria Bacteria Overview
    10 questions

    Neisseria Bacteria Overview

    SupportingDoppelganger avatar
    SupportingDoppelganger
    Use Quizgecko on...
    Browser
    Browser