10 Questions
What is the purpose of Mannitol Salt Agar (MSA)?
To select for members of the genus Staphylococcus
Why is Staphylococcus considered facultatively anaerobic?
Because it can survive in both the presence and absence of oxygen
What causes the phenol red in Mannitol Salt Agar to turn yellow?
The fermentation of mannitol producing an acidic byproduct
What type of hemolysis is typical for Staphylococcus?
Beta hemolysis
Which type of bacteria does Mannitol Salt Agar primarily select for?
Staphylococcus species
Which type of streptococci breaks down red blood cells and hemoglobin completely?
Beta-hemolytic
What causes the greenish color in alpha hemolysis on blood agar?
Biliverdin
Which characteristic helps classify streptococci into three groups based on hemolysis on blood agar?
Colony morphology
What is the distinguishing feature of gamma-hemolytic streptococci on blood agar?
No hemolysis
Which type of streptococci perform better in an anaerobic environment due to their hemolysins?
Obligate anaerobes
Test your knowledge on Staphylococcus genus, Staphylococcus aureus, and selective media like MSA and SM1 10 for isolating Staphylococci. Learn about the properties of selective and differential media, as well as the significance of indicators like mannitol fermentation in bacterial identification.
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