Classification of Bacterial Culture Media Quiz
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Questions and Answers

Which type of hemolysis results in a complete lysis of red cells around and under the colonies?

  • Alpha-hemolysis
  • Beta-hemolysis (correct)
  • Delta-hemolysis
  • Gamma-hemolysis
  • Which enzyme is responsible for the complete lysis of red blood cells in beta-hemolysis?

  • Lipase
  • Catalase
  • Hemolysin (correct)
  • Protease
  • Which component of the medium causes the agar under and surrounding the colony to appear dark and greenish in alpha-hemolysis?

  • Fibrinogen
  • NAD and hematin
  • Cholesterol
  • Methemoglobin (correct)
  • Which bacterium produces streptolysin O, resulting in β-hemolysis under the surface of blood agar?

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

    Which type of bacteria does not cause any lysis of red blood cells, resulting in no change of coloration or zone of hemolysis?

    <p>Neisseria meningitidis</p> Signup and view all the answers

    Which type of media is composed of basal medium and enriched substances like blood, serum, egg yolk, and amino acids?

    <p>Enriched media</p> Signup and view all the answers

    What is the purpose of using Blood Agar (B.A)?

    <p>To differentiate bacteria based on their hemolytic properties</p> Signup and view all the answers

    What substance is added to Blood Agar after the blood agar base powder is sterilized and cooled?

    <p>Defibrinated blood</p> Signup and view all the answers

    Which type of bacteria are cultivated and isolated using Blood Agar (B.A)?

    <p>Nutritionally fastidious bacteria</p> Signup and view all the answers

    What is the primary purpose of Basal media (Simple media)?

    <p>To maintain nonfastidious bacteria</p> Signup and view all the answers

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