Streptococcus Bacteriology Quiz
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Questions and Answers

What is the main classification basis for Streptococci?

  • Gram staining, Motility, and Capsule formation
  • Enzyme production, Toxin secretion, and Flagella presence
  • Temperature tolerance, Spore formation, and Cell wall composition
  • Oxygen requirement, Hemolysis, and Antigenic structure (correct)
  • Which site is notably inhabited by Streptococci as commensals?

  • Skin surface
  • Gastrointestinal tract
  • Genitourinary tract
  • Upper respiratory tract (correct)
  • What type of media is required for the culture of most Streptococci?

  • Enriched media like blood agar (correct)
  • Selective media like MacConkey agar
  • Differential media like Eosin Methylene Blue agar
  • Nutrient agar without any additives
  • At what temperature does S. faecalis grow, unlike most Streptococci?

    <p>15-45°C</p> Signup and view all the answers

    What is present in the cell wall of Streptococci?

    <p>Protein, carbohydrate, and peptidoglycan</p> Signup and view all the answers

    Study Notes

    Streptococci Classification and Characteristics

    • The main classification basis for Streptococci is based on hemolytic activity, which includes alpha-hemolytic, beta-hemolytic, and gamma-hemolytic (non-hemolytic) species.
    • Streptococci are commensals and can be found in the human throat, skin, and gut.

    Culture and Growth Requirements

    • Most Streptococci require enriched media, such as blood agar, for culture.
    • S. faecalis grows at 45°C, unlike most Streptococci which typically grow at 37°C.

    Cell Wall Composition

    • The cell wall of Streptococci contains teichoic acid.

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    Description

    Test your knowledge of medical microbiology with this quiz on Streptococcus bacteriology. Learn about the characteristics, cell wall composition, and growth patterns of this diverse group of gram-positive cocci.

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