Medical Microbiology Lecture No. 5(b)-7: Neisseria General Characteristics
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Questions and Answers

Which characteristic is common to both Neisseria gonorrhoeae and Neisseria meningitidis?

  • Oxidase positive (correct)
  • Ferment carbohydrates producing gas
  • Pathogenic to humans only
  • Non-motile

    • What is the most suitable atmosphere for the growth of pathogenic Neisseria species?

  • Atmosphere containing 5-10% CO2 (correct)
  • Atmosphere containing 20% O2
  • Atmosphere containing 30% O2
  • Atmosphere containing 50% CO2

    • Which of the following is a non-pathogenic (commensal) Neisseria species?

  • N. mucosa
  • N. catarrhalis (correct)
  • N. meningitidis
  • N. gonorrhoeae

    • What is the shape of Neisseria diplococci with flat or concave opposing edge?

    <p>Kidney shape</p> Signup and view all the answers

    Which feature distinguishes pathogenic Neisseria species from non-pathogenic ones?

    <p>Intracellular vs extracellular localization</p> Signup and view all the answers

    What type of agar is typically needed for the growth of pathogenic species?

    <p>Blood agar</p> Signup and view all the answers

    What distinguishes meningococci from gonococci in terms of their growth characteristics?

    <p>Meningococci grow faster and form larger colonies</p> Signup and view all the answers

    Which statement about Neisseria gonorrhoeae (Gonococcus) is correct?

    <p>It requires complex media pre-warmed to 35-37°C</p> Signup and view all the answers

    What is the primary mode of transmission for Neisseria gonorrhoeae?

    <p>Sexual contact</p> Signup and view all the answers

    What complication can gonorrhea cause in women?

    <p>Pelvic Inflammatory Disease (PID)</p> Signup and view all the answers

    What is the distinctive arrangement of Neisseria diplococci?

    <p>Arranged in pairs with adjacent sides flattened (like coffee beans)</p> Signup and view all the answers

    What is the primary distinguishing characteristic of pathogenic Neisseria species?

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

    What is the preferred growth environment for Neisseria species?

    <p>Atmosphere containing (5-10)% of CO2 on heated blood agar (chocolate agar)</p> Signup and view all the answers

    What is the distinguishing characteristic of non-pathogenic (commensal) Neisseria species?

    <p>They are normal inhabitants of the human respiratory tract</p> Signup and view all the answers

    What is the characteristic that distinguishes Neisseria gonorrhoeae (Gonococcus) from Neisseria meningitidis (meningococci)?

    <p>Neisseria gonorrhoeae is a cause of gonorrhea, a sexually transmitted disease (STD)</p> Signup and view all the answers

    What distinguishes the growth requirements of non-pathogenic Neisseria species from pathogenic species?

    <p>simple media vs. enriched media (e.g. blood and chocolate agar)</p> Signup and view all the answers

    How are gonococci and meningococci differentiated?

    <p>few LAB tests and specific characteristics</p> Signup and view all the answers

    What is the primary mode of transmission for Neisseria gonorrhoeae?

    <p>sexual contact</p> Signup and view all the answers

    What are the differences in clinical presentation between men and women infected with Neisseria gonorrhoeae?

    <p>Men: Urethritis; Epididymitis; Women: Cervicitis; Vaginitis; Salpingitis</p> Signup and view all the answers

    What is the consequence of untreated Neisseria gonorrhoeae infection in newborns?

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

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