Enterobacteria and Pathogens Quiz
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Questions and Answers

Which of the following is a Gram-negative, kidney-shaped cocci usually arranged in pairs and is oxidase-positive?

  • Salmonella spp.
  • Neisseria gonorrhoeae (correct)
  • Haemophilus influenzae
  • Escherichia coli
  • Which bacteria is capnophilic and requires a temperature of 36-39°C for growth?

  • Salmonella spp.
  • Escherichia coli
  • Haemophilus influenzae
  • Neisseria gonorrhoeae (correct)
  • Which bacteria is known to be non-motile and nutritionally fastidious, especially on clinical specimens?

  • Haemophilus influenzae
  • Neisseria gonorrhoeae (correct)
  • Salmonella spp.
  • Escherichia coli
  • Which bacteria is a member of the Enterobacteriaceae family and is a common cause of urinary tract infections?

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

    Which bacteria is associated with causing whooping cough?

    <p>Bordetella pertussis</p> Signup and view all the answers

    Which bacteria is known for its association with cholera?

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

    Which species of Neisseria is commonly found in the oral cavity, nose, and pharynx?

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

    What is the major aetiological agent of upper respiratory tract infections and acute exacerbations of chronic bronchitis?

    <p>Haemophilus influenzae</p> Signup and view all the answers

    Which organism is known for causing opportunistic meningitis and endocarditis?

    <p>Moraxella spp.</p> Signup and view all the answers

    What is the mortality rate associated with untreated meningococcal meningitis?

    <p>80%</p> Signup and view all the answers

    Which Neisseria species is resistant to β-lactams?

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

    How is N. meningitidis transmitted?

    <p>Droplet spread</p> Signup and view all the answers

    Which bacteria are fastidious slow-growing residents of the mouth and can cause severe infections, particularly endocarditis?

    <p>Eikenella corrodens</p> Signup and view all the answers

    Which group of bacteria includes Haemophilus spp., Aggregatibacter actinomycetemcomitans, Cardiobacterium hominis, Eikenella corrodens, and Kingella kingae?

    <p>HACEK group bacteria</p> Signup and view all the answers

    Which bacteria are characterized by being capnophilic, Gram-negative, short coccobacilli, and capable of corroding agar surfaces?

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

    What are the predisposition factors for infections caused by Eikenella corrodens?

    <p>Trauma to mucosal surface</p> Signup and view all the answers

    How are infections caused by Eikenella corrodens typically transmitted?

    <p>Through human bites or fist-fight injuries</p> Signup and view all the answers

    Which bacterial family includes fastidious slow-growing bacteria resident in the mouth and causing severe infections, particularly endocarditis?

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

    Which bacterium causes typhoid fever and can be prevented by proper cooking and vaccination?

    <p>Salmonella enterica serotype Typhi</p> Signup and view all the answers

    What is the reason for avoiding antibiotics in the treatment of inflammatory diarrhea caused by Shigella spp.?

    <p>Due to resistance</p> Signup and view all the answers

    Which bacterium can cause severe pneumonia and urinary tract infections, especially in hospitalized patients?

    <p>Klebsiella pneumoniae</p> Signup and view all the answers

    Which bacterium is associated with nosocomial urinary tract infections and is Gram-negative?

    <p>Enterobacter spp.</p> Signup and view all the answers

    Which bacterium is common in the environment, can cause nosocomial infections, especially in burns patients, and is resistant to most antimicrobial agents?

    <p>Pseudomonas aeruginosa</p> Signup and view all the answers

    Which bacterium is not associated with periodontal infections, is Gram-negative, and is found in the oral cavity of up to 25% of the population?

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

    Which bacterium is known for its association with cholera?

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

    What is the major aetiological agent of upper respiratory tract infections and acute exacerbations of chronic bronchitis?

    <p>Haemophilus influenzae</p> Signup and view all the answers

    Which bacterium is implicated in food poisoning?

    <p>Campylobacter spp.</p> Signup and view all the answers

    Which bacterium is associated with nosocomial urinary tract infections and is Gram-negative?

    <p>Pseudomonas aeruginosa</p> Signup and view all the answers

    Which bacterium causes dysentery?

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

    Which bacterium is characterized by being capnophilic, Gram-negative, short coccobacilli, and capable of corroding agar surfaces?

    <p>Haemophilus influenzae</p> Signup and view all the answers

    Which of the following is true about Vibrio cholerae?

    <p>They are Gram-negative, highly motile slightly curved rods</p> Signup and view all the answers

    What is a characteristic of Campylobacter spp.?

    <p>They are implicated in food poisoning</p> Signup and view all the answers

    What is the method used for diagnostic testing of Helicobacter pylori?

    <p>Breath test measuring exhaled carbon dioxide after swallowing urea</p> Signup and view all the answers

    Which statement is true about the pathogenicity of Vibrio cholerae?

    <p>It is due to the production of cholera toxin leading to severe watery diarrhea</p> Signup and view all the answers

    What is a characteristic of Wolinella spp.?

    <p>They are curved or helical Gram-negative rods</p> Signup and view all the answers

    What is the significance of Helicobacter pylori in relation to gastric cancer?

    <p>It may play a role in the development of gastric cancer</p> Signup and view all the answers

    Study Notes

    Enterobacteria and Related Pathogens

    • Typhoid fever caused by Salmonella enterica serotype Typhi and Paratyphi; can be prevented by proper cooking and vaccination
    • Typhoid Mary, an asymptomatic carrier, infected many people and was quarantined for nearly three decades
    • Shigella spp. cause inflammatory diarrhea and are treated with fluid replacement; antibiotics are avoided due to resistance
    • Klebsiellae, including Klebsiella pneumoniae, can cause severe pneumonia and urinary tract infections, especially in hospitalized patients
    • Enterobacter spp. and Serratia spp. can also cause nosocomial urinary tract infections
    • Pseudomonas spp., including Pseudomonas aeruginosa, are common in the environment and can cause nosocomial infections, especially in burns patients
    • Enterobacteria are not associated with periodontal infections, are Gram-negative, and are found in the oral cavity of up to 25% of the population
    • Klebsiella pneumoniae has a polysaccharide capsule
    • Pseudomonas aeruginosa is an important agent of nosocomial infections, resistant to most antimicrobial agents, and produces extracellular slime that resists phagocytosis
    • Yersinia pestis causes plague, while Vibrio cholerae causes life-threatening watery diarrhea; both have distinctive morphological features
    • Vibrio cholerae secretes an enterotoxin, causing rapid onset of symptoms
    • Treatment and prevention of V. cholerae infection involves fluid and electrolyte replacement, oral rehydration therapy, and tetracycline if necessary

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    Description

    Test your knowledge of Enterobacteria and related pathogens with this quiz. Explore topics such as typhoid fever, Shigella spp., Klebsiellae, Pseudomonas spp., Yersinia pestis, and Vibrio cholerae. Practice identifying distinctive morphological features and understanding treatment and prevention methods.

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