Staphylococci Genus Properties
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Questions and Answers

Which type of Staphylococci is novobiocin sensitive?

  • Staphylococcus aureus
  • Staphylococcus saprophyticus
  • Staphylococcus epidermidis (correct)
  • Staphylococcus haemolyticus

What type of infections can Staphylococcus epidermidis cause in debilitated patients?

  • Infections related to biomedical devices (correct)
  • Urinary tract infections
  • Respiratory infections
  • Skin infections

Which Staphylococci is the second most common cause of urinary tract infections in young women after E. coli?

  • Staphylococcus epidermidis
  • Staphylococcus aureus
  • Staphylococcus saprophyticus (correct)
  • Staphylococcus haemolyticus

Which type of Staphylococci is novobiocin resistant?

<p>Staphylococcus saprophyticus (A)</p> Signup and view all the answers

Which type of Staphylococci is non-haemolytic and coagulase negative?

<p>Staphylococcus epidermidis (D)</p> Signup and view all the answers

Which of the following is a characteristic of Staphylococci?

<p>Arranged in grape-like irregular clusters (A)</p> Signup and view all the answers

Which Staphylococci species is classified as Coagulase positive?

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

What is the most important pathogen of the Staphylococci genus mentioned in the text?

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

Which virulence factor of Staphylococcus aureus inhibits opsonization by binding to the Fc region of IgG?

<p>Protein A (B)</p> Signup and view all the answers

Which Staphylococci species causes food poisoning by its Enterotoxin?

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

What does Clumping factor, a virulence factor of Staphylococcus aureus, convert fibrinogen into?

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

What is the role of the Coagulase enzyme in Staphylococcus aureus infections?

<p>Causes plasma to clot by activating prothrombin (A)</p> Signup and view all the answers

Which toxin is responsible for marked necrosis of the skin and haemolysis in Staphylococcus aureus infections?

<p>Alpha toxin (B)</p> Signup and view all the answers

What is the significance of deposited fibrin in a Staphylococcus aureus infection?

<p>Limits accessibility of antibiotics to the infection site (A)</p> Signup and view all the answers

In laboratory diagnosis of S. aureus infections, which agar produces golden yellow colonies with endo pigment?

<p>Blood agar (C)</p> Signup and view all the answers

Which specimen is ideal for the diagnosis of Staphylococcus aureus pneumonia?

<p>Sputum (D)</p> Signup and view all the answers

What is the primary role of thrombin in Staphylococcus aureus infections?

<p>Activates fibrinogen to form the fibrin clot (D)</p> Signup and view all the answers

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