Staphylococcus aureus Quiz

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Questions and Answers

S. aureus is a gram ______ cocci that forms grape-like clusters

+ve

What is the shape of Staphylococcus aureus?

  • Rod-shaped
  • Spiral-shaped
  • Irregular-shaped
  • Spherical (correct)

______ and coagulase are both positive in S. aureus

catalase

Transmission of S. aureus can occur by person to person contact, ______, and ingestion of enterotoxins

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

What is the major mode of transmission for S. aureus?

<p>Person to person contact (C)</p> Signup and view all the answers

S. aureus is a major cause of many ______ infections

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

Which disease is caused by heat-resistant enterotoxins produced by S. aureus?

<p>Food poisoning (B)</p> Signup and view all the answers

Excessive use of methicillin can lead to ______

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

Excessive use of methicillin can lead to the development of ______, which can cause serious nosocomial infections and bacteremia

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

Flashcards

What is the Gram staining of S. aureus?

S. aureus is a type of bacteria that stains purple under a microscope due to its thick cell wall.

What is the shape of S. aureus?

S. aureus bacteria are round-shaped.

What two tests are positive in S. aureus?

Catalase is an enzyme that breaks down hydrogen peroxide, while coagulase helps bacteria form clots in blood.

How is S. aureus transmitted?

S. aureus can spread through direct contact with an infected person, contaminated objects, or consuming food contaminated with enterotoxins.

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What type of infections are commonly associated with S. aureus?

S. aureus can cause infections in hospitals and healthcare settings.

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What disease is caused by S. aureus toxins?

Staphylococcus aureus can produce toxins that cause food poisoning.

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What does MRSA stand for?

MRSA stands for Methicillin-Resistant Staphylococcus aureus and is a strain of S. aureus that is resistant to many antibiotics.

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What can happen due to excessive use of methicillin?

Using methicillin excessively can lead to the development of MRSA, which is a serious threat due to its antibiotic resistance.

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What can MRSA cause?

MRSA can cause severe infections in hospitals and bloodstream infections, making it particularly worrisome.

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