Staphylococci Group Characteristics Quiz
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Questions and Answers

What are the characteristics of staphylococci?

Gram-positive cocci, nonflagellate, nonmotile, non–spore-forming, catalase positive

How do you test for catalase in staphylococci?

Add H2O2 to a petri dish with staphylococci and observe for bubbling

What distinguishes Staphylococcus aureus from other species of staphylococci?

Coagulase positivity

What is the most virulent species of staphylococci?

<p>Staphylococcus aureus</p> Signup and view all the answers

What is the common classification for species other than Staphylococcus aureus?

<p>Coagulase-negative staphylococci (CoNS)</p> Signup and view all the answers

What is the distinguishing characteristic of Staphylococcus aureus?

<p>Coagulase positive</p> Signup and view all the answers

What enzyme do all types of staphylococcus bacteria contain, which results in a bubbling effect when H2O2 is added?

<p>Catalase</p> Signup and view all the answers

What type of growth conditions do staphylococci prefer?

<p>Aerobic</p> Signup and view all the answers

What is the common classification for species other than Staphylococcus aureus?

<p>Coagulase-negative staphylococci (CoNS)</p> Signup and view all the answers

What is the typical result of adding H2O2 to a solution containing catalase-positive staphylococci?

<p>Bubbling</p> Signup and view all the answers

Flashcards

Staphylococci Characteristics

Gram-positive, spherical bacteria that lack flagella, are non-motile, and don't form spores. They are also catalase-positive.

Catalase

An enzyme that breaks down hydrogen peroxide (H2O2) into water (H2O) and oxygen (O2).

Catalase Test

A test that identifies the presence of catalase in bacteria by adding hydrogen peroxide. A positive result is observed as bubbling due to the release of oxygen.

Staphylococcus aureus

A type of staphylococcal bacteria that produces the enzyme coagulase.

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Coagulase

An enzyme that clots blood plasma. It is produced by Staphylococcus aureus and is used in identifying this species.

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Coagulase-Negative Staphylococci (CoNS)

Any staphylococcal bacteria that does not produce coagulase.

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Most Virulent Staphylococci

The most virulent species of staphylococci, known for producing coagulase.

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Staphylococci Growth Conditions

Staphylococci prefer environments rich in oxygen to grow and thrive.

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Catalase Positive Reaction

The process of adding hydrogen peroxide to a solution of catalase-positive staphylococci. The presence of catalase will result in the release of oxygen, causing visible bubbling.

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Staphylococci

A group of bacteria that includes many different species, but the most dangerous is Staphylococcus aureus.

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