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Questions and Answers
Which type of hemolysis results in a complete lysis of red cells around and under the colonies?
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?
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?
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?
Which bacterium produces streptolysin O, resulting in β-hemolysis under the surface of blood agar?
Which type of bacteria does not cause any lysis of red blood cells, resulting in no change of coloration or zone of hemolysis?
Which type of bacteria does not cause any lysis of red blood cells, resulting in no change of coloration or zone of hemolysis?
Which type of media is composed of basal medium and enriched substances like blood, serum, egg yolk, and amino acids?
Which type of media is composed of basal medium and enriched substances like blood, serum, egg yolk, and amino acids?
What is the purpose of using Blood Agar (B.A)?
What is the purpose of using Blood Agar (B.A)?
What substance is added to Blood Agar after the blood agar base powder is sterilized and cooled?
What substance is added to Blood Agar after the blood agar base powder is sterilized and cooled?
Which type of bacteria are cultivated and isolated using Blood Agar (B.A)?
Which type of bacteria are cultivated and isolated using Blood Agar (B.A)?
What is the primary purpose of Basal media (Simple media)?
What is the primary purpose of Basal media (Simple media)?
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