18 Questions
What does a positive DNase test indicate?
Hydrolysis of the medium
In the Mannitol Fermentation Test, what color indicates growth with fermentation?
Yellow halos
What is the result of a Novobiocin Susceptibility Test for S.epidermidis?
Zone diameter greater than 16 mm
Which organism shows no color change or an orange color in the PYR Test?
S.aureus
What does a negative catalase test result indicate?
Negative for catalase production
What is the characteristic result of S.aureus in the Coagulase Test?
Positive coagulase activity
What is the main purpose of the Catalase Test described in the text?
To test the breakdown of H2O2 into oxygen and water
Which type of bacteria would most likely produce macroscopic clumping in the Coagulase Slide Test?
Staphylococcus aureus
What is the result of the Coagulase Tube Test if no clot is formed?
Negative for free coagulase
Which test detects the resistance to 0.04U Bacitracin?
Novobiocin Susceptibility Test
What does a positive result in the DNAse Test suggest?
Presence of nuclease activity
In the Mannitol Fermentation Test, what does a change in pH due to fermentation typically result in?
Yellow color change of the medium
What is the purpose of using Colistin-Nalidixic Agar or Phenylethyl Alcohol Agar as mentioned in the text?
To selectively isolate Staphylococci
Which organism shows total inhibition on Colistin-Nalidixic Agar or Phenylethyl Alcohol Agar?
E.coli
What does a positive catalase test indicate?
Presence of Staphylococcus
In the Novobiocin susceptibility test, which organism is resistant?
S.epidermidis
What is the key characteristic of Mannitol Salt Agar?
Differential for Staphylococcus based on mannitol fermentation
Which test can differentiate between Staphylococcus aureus and Staphylococcus epidermidis?
Coagulase test
Test your knowledge on various microbiology identification tests such as catalase and Microdase tests. Learn about the reactions and results of each test for different bacterial species.
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