Streptococcus Bacteria Characteristics Quiz
18 Questions
0 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 characteristic helps differentiate Group D streptococci from other genera?

  • Catalase positivity (correct)
  • Capsule formation
  • Beta-hemolysis on blood agar
  • Loss of Gram-positive characteristic with age
  • What is a distinguishing feature of Group B streptococci (S. agalactiae) in biochemical tests?

  • Beta-hemolysis on blood agar
  • Alpha-hemolysis on blood agar
  • Capsule formation (correct)
  • Catalase positivity
  • How can Streptococcus pyogenes (Group A) be differentiated from other genera?

  • Gram-negative staining in old cultures
  • Beta-hemolysis on blood agar (correct)
  • Catalase negativity
  • Alpha-hemolysis on blood agar
  • What distinguishes Streptococcus from other genera in terms of catalase reaction?

    <p>Catalase negativity</p> Signup and view all the answers

    Which of the following is a characteristic feature of S. pneumoniae (pneumococci) for biochemical identification?

    <p>Alpha-hemolysis on blood agar</p> Signup and view all the answers

    Which characteristic helps differentiate Streptococcus from Neisseria when considering Gram staining characteristics?

    <p>Gram-negative staining</p> Signup and view all the answers

    Which of the following statements is true regarding the differentiation of Staphylococcus species based on the coagulase test?

    <p>S.intermedius is a common isolate for coagulase positive Staphylococcus infections in humans.</p> Signup and view all the answers

    In the biochemical identification of Stomatococcus versus other families, which enzyme is used as a differentiating factor?

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

    What is the characteristic result of the coagulase test for Staphylococcus aureus?

    <ul> <li>(positive)</li> </ul> Signup and view all the answers

    Which species among Staphylococci is sensitive to Bacitracin?

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

    Which Staphylococcus species is resistant to Novobiocin?

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

    What is the key enzyme that is used to differentiate S.aureus from S.epidermidis and S.saprophyticus?

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

    Which group of Streptococci is identified by a positive CAMP (Christie, Atkins, Munch-Peterson) test?

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

    What biochemical test can differentiate between Group A Streptococcus pyogenes and other groups such as Enterococci?

    <p>Pyroglutamyl aminopeptidase (pyr) production</p> Signup and view all the answers

    Which Streptococcus group shows sensitivity to bacitracin?

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

    How is Streptococcus pneumoniae differentiated from viridans group Streptococci?

    <p>Optochin susceptibility</p> Signup and view all the answers

    Which biochemical test can help identify Group B Streptococcus based on the production of a substance that enlarges the area of hemolysis?

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

    What differentiates all group D Streptococci from other groups in terms of bile esculin hydrolysis?

    <ul> <li>for esculin hydrolysis</li> </ul> Signup and view all the answers

    More Like This

    Classification of Streptococcus Bacteria Quiz
    12 questions
    Streptococcus Classification Quiz
    32 questions
    Streptococcus Quiz - NEET Pattern
    39 questions
    Use Quizgecko on...
    Browser
    Browser