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Questions and Answers

Which food item had the highest rates of contamination in a CDC study?

  • Deli ready meats (correct)
  • Coleslaw
  • Soft cheeses
  • Milk
  • What percentage of sporadic Listeria cases can be attributed to soft cheeses or deli meats?

  • 32% (correct)
  • 64%
  • 100%
  • 11%
  • Which population group is at the highest risk for Listeria infection?

  • Infants < 1 month old
  • Adults > 60 years old
  • HIV patients
  • Pregnant women (correct)
  • How does Listeria primarily spread from person to person?

    <p>Vertical transmission mother to fetus</p> Signup and view all the answers

    What is the mean incubation period for Listeria?

    <p>31 days</p> Signup and view all the answers

    Which virulence factor of Listeria allows it to attach to host epithelial cells?

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

    How does Listeria escape from host cell phagosomes?

    <p>Listeriolysin O</p> Signup and view all the answers

    What is the main mechanism by which Listeria moves from cell to cell?

    <p>Actin polymerization</p> Signup and view all the answers

    Which of the following is NOT a characteristic of Listeria monocytogenes?

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

    Listeria monocytogenes grows well at which temperature range?

    <p>4 - 10°C</p> Signup and view all the answers

    Which of the following is a characteristic motility of Listeria monocytogenes?

    <p>Tumbling motility</p> Signup and view all the answers

    Which of the following is a common source of Listeria monocytogenes infection?

    <p>Raw vegetables</p> Signup and view all the answers

    Which of the following tests can be used to confirm the identification of Listeria monocytogenes?

    <p>Esculin test</p> Signup and view all the answers

    Listeria monocytogenes has a tropism for which body system?

    <p>Nervous system</p> Signup and view all the answers

    Listeria monocytogenes is commonly found in which of the following?

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

    Which of the following is NOT a food that can be contaminated with Listeria monocytogenes?

    <p>Raw milk</p> Signup and view all the answers

    Which age group has the highest mortality rate from Listeria meningitis?

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

    What is the most common cause of bacterial meningitis in patients with compromised immune systems?

    <p>Listeria monocytogenes</p> Signup and view all the answers

    Which of the following is a unique feature of Listeria meningitis?

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

    What is the most common cause of bacterial meningitis in neonates?

    <p>Streptococcus agalactiae</p> Signup and view all the answers

    Which imaging modality is superior for identifying parenchymal brain involvement in Listeria meningitis?

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

    What is the recommended treatment duration for rhombencephalitis or brain abscess caused by Listeria?

    <p>6 weeks</p> Signup and view all the answers

    Which of the following is a recommended preventive measure for Listeriosis?

    <p>Avoiding raw milk</p> Signup and view all the answers

    What is the most common cause of bacterial meningitis in patients with HIV?

    <p>Listeria monocytogenes</p> Signup and view all the answers

    What is the recommended treatment for Listerial endocarditis?

    <p>Ampicillin + gentamicin</p> Signup and view all the answers

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