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Questions and Answers
What is the purpose of Mannitol Salt Agar (MSA)?
What is the purpose of Mannitol Salt Agar (MSA)?
- To select for members of the genus Staphylococcus (correct)
- To prevent the growth of any bacteria
- To encourage the growth of all bacteria equally
- To solely inhibit the growth of Staphylococcus aureus
Why is Staphylococcus considered facultatively anaerobic?
Why is Staphylococcus considered facultatively anaerobic?
- Because it cannot survive in the presence of oxygen
- Because it can survive in both the presence and absence of oxygen (correct)
- Because it prefers anaerobic conditions
- Because it can only survive in the presence of oxygen
What causes the phenol red in Mannitol Salt Agar to turn yellow?
What causes the phenol red in Mannitol Salt Agar to turn yellow?
- The high salt concentration
- The fermentation of mannitol producing an acidic byproduct (correct)
- The addition of Staphylococcus aureus
- The presence of gram-negative bacteria
What type of hemolysis is typical for Staphylococcus?
What type of hemolysis is typical for Staphylococcus?
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Which type of bacteria does Mannitol Salt Agar primarily select for?
Which type of bacteria does Mannitol Salt Agar primarily select for?
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Which type of streptococci breaks down red blood cells and hemoglobin completely?
Which type of streptococci breaks down red blood cells and hemoglobin completely?
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What causes the greenish color in alpha hemolysis on blood agar?
What causes the greenish color in alpha hemolysis on blood agar?
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Which characteristic helps classify streptococci into three groups based on hemolysis on blood agar?
Which characteristic helps classify streptococci into three groups based on hemolysis on blood agar?
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What is the distinguishing feature of gamma-hemolytic streptococci on blood agar?
What is the distinguishing feature of gamma-hemolytic streptococci on blood agar?
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Which type of streptococci perform better in an anaerobic environment due to their hemolysins?
Which type of streptococci perform better in an anaerobic environment due to their hemolysins?
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