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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?

Staphylococcus saprophyticus (A) Signup and view all the answers

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

Staphylococcus epidermidis (D) Signup and view all the answers

Which of the following is a characteristic of Staphylococci?

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

Which Staphylococci species is classified as Coagulase positive?

Staphylococcus aureus (A) Signup and view all the answers

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

Staphylococcus aureus (D) Signup and view all the answers

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

Protein A (B) Signup and view all the answers

Which Staphylococci species causes food poisoning by its Enterotoxin?

Staphylococcus aureus (A) Signup and view all the answers

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

Fibrin (B) Signup and view all the answers

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

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

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

Alpha toxin (B) Signup and view all the answers

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

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

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

Blood agar (C) Signup and view all the answers

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

Sputum (D) Signup and view all the answers

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

Activates fibrinogen to form the fibrin clot (D) Signup and view all the answers