Staphylococcus aureus Characteristics and Transmission Quiz

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Which virulence factor of Staphylococcus aureus helps the bacterium evade the host immune response by promoting clot formation?

DNAse

Hyaluronidase

Coagulase (correct)

Lipase

What is the function of Staphylokinase in Staphylococcus aureus infections?

Breaking down lipids on the skin surface

Destroying DNA

Dissolving fibrin clots to facilitate infection spread (correct)

Promoting clot formation

Which enzyme of Staphylococcus aureus digests hyaluronic acid present in connective tissues to enhance invasion and survival in tissue?

Coagulase

DNAse

Hyaluronidase (correct)

Lipase

What is the main function of DNAse in Staphylococcus aureus infections?

Destroying DNA to enhance pathogen mobility (D) Signup and view all the answers

Which enzyme of Staphylococcus aureus degrades lipids on the skin surface, allowing bacterial entry into epidermal layers?

Lipase (C) Signup and view all the answers

What is the function of Staphylococcus aureus coagulase?

Promoting clot formation to protect bacteria (B) Signup and view all the answers

Which toxin is produced by all strains of Staphylococcus aureus and suppresses phagocytosis?

Gamma Toxin (B) Signup and view all the answers

Which condition is characterized by bullous exfoliative dermatitis and primarily occurs in newborns?

Scalded Skin Syndrome (SSS) (C) Signup and view all the answers

What is the main source of hospital-acquired infections from contaminated medical instruments and devices?

Staphylococcus epidermidis (A) Signup and view all the answers

Which skin condition presents as localized skin lesions in the form of blisters?

<ul> <li>Pemphigus neonatorum (C)</li> </ul> Signup and view all the answers

What contributes to the invasiveness of Staphylococcus aureus by being associated with Gamma Toxin?

Staphylococcal food poisoning (C) Signup and view all the answers

Which factor is associated with women using highly absorbent tampons and can lead to hypotension and shock?

Toxic Shock Syndrome (A) Signup and view all the answers

Which virulence factor of Staphylococcus aureus inhibits phagocytosis and promotes adhesion to host cells?

Capsular polysaccharide (B) Signup and view all the answers

What makes Beta-lactamase significant in the context of Staphylococcus aureus?

It breaks down penicillin and confers resistance to antibiotics (D) Signup and view all the answers

Which factor contributes to the pathogenicity of Staphylococcus aureus by having endotoxin-like activity?

Peptidoglycan (B) Signup and view all the answers

What is the function of Protein A in Staphylococcus aureus infections?

Prevents opsonization and phagocytosis by host immune cells (D) Signup and view all the answers

Which factor of Staphylococcus aureus helps the bacterium evade the host immune system by inhibiting phagocytosis?

Capsular polysaccharide (B) Signup and view all the answers

What is the most common etiology of Staphylococcal food poisoning?

Enterotoxin A (D) Signup and view all the answers