Identifying Streptococcus pneumoniae Characteristics Quiz
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Questions and Answers

Which of the following is a characteristic of the Viridans streptococci group?

  • They are typically non-hemolytic or α-hemolytic on blood agar. (correct)
  • They are typically β-hemolytic on blood agar.
  • They are not part of the normal microbiota of the human body.
  • They are obligate anaerobes.
  • Which of the following Viridans streptococci groups is associated with dental caries?

  • S. mitis group
  • S. bovis group
  • S. salivarius group
  • S. mutans group (correct)
  • Which of the following tests can be used to differentiate Streptococcus pneumoniae from other α-hemolytic streptococci?

  • Oxidase test
  • Optochin susceptibility test (correct)
  • Catalase test
  • Coagulase test
  • Which of the following is a key virulence factor of Streptococcus pneumoniae?

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

    Which Viridans streptococci group is associated with endocarditis?

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

    Which Viridans streptococci group is known to produce bacteriocins that inhibit the growth of other oral bacteria?

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

    Which of the following is not a common virulence factor associated with the S. anginosus group?

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

    Which biochemical test can be used to distinguish viridans streptococci from other α-hemolytic streptococci?

    <p>Leucine aminopeptidase (LAP) test</p> Signup and view all the answers

    Which Streptococcus group is known to be the most common cause of subacute bacterial endocarditis associated with oral infections?

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

    Which Streptococcus group is known to be the predominant member of the normal oral flora?

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

    Which characteristic biochemical property helps distinguish the S. mutans group from other viridans streptococci?

    <p>Mannitol fermentation</p> Signup and view all the answers

    Which Streptococcus group is known to be associated with dental caries formation?

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

    Which characteristic is common to the Abiotrophia and Granulicatella species?

    <p>They require sulfhydryl compounds for growth</p> Signup and view all the answers

    Which group of streptococci is associated with bacteremia, endocarditis, and UTI infections?

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

    What is the key biochemical test to differentiate between Aerococcus viridans and Aerococcus urinae?

    <p>Bile esculin hydrolysis</p> Signup and view all the answers

    Which Enterococcus species is typically associated with the gastrointestinal tract?

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

    Which Enterococcus species is typically associated with the oral cavity?

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

    What is the key distinguishing feature between the Streptococcus mitis group and the Streptococcus mutans group?

    <p>Ability to ferment trehalose and starch</p> Signup and view all the answers

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