Podcast
Questions and Answers
Which of the following is NOT a virulence factor of Streptococcus pyogenes?
Which of the following is NOT a virulence factor of Streptococcus pyogenes?
- Endotoxin (correct)
- Hyaluronic acid capsule
- M protein
- Streptokinase
What is the primary mechanism by which the hyaluronic acid capsule contributes to the virulence of Streptococcus pyogenes?
What is the primary mechanism by which the hyaluronic acid capsule contributes to the virulence of Streptococcus pyogenes?
- It provides resistance to phagocytosis by the host's immune cells. (correct)
- It increases the permeability of the host's tissues, facilitating spread of infection.
- It produces a toxin that damages host cells.
- It allows the bacteria to adhere to host cells more effectively.
Which of the following complications is associated with a type III hypersensitivity reaction to Streptococcus pyogenes infection?
Which of the following complications is associated with a type III hypersensitivity reaction to Streptococcus pyogenes infection?
- Erythema nodosum
- Glomerulonephritis (correct)
- Rheumatic fever
- Scarlet fever
Which of the following enzymes produced by Streptococcus pyogenes contributes to the characteristic 'spreading' of the infection?
Which of the following enzymes produced by Streptococcus pyogenes contributes to the characteristic 'spreading' of the infection?
What is the most common treatment for Streptococcus pyogenes infections?
What is the most common treatment for Streptococcus pyogenes infections?
What is the Lancefield group of Streptococcus pyogenes?
What is the Lancefield group of Streptococcus pyogenes?
How is the Lancefield group of Streptococcus determined?
How is the Lancefield group of Streptococcus determined?
What type of infection does Streptococcus agalactiae cause?
What type of infection does Streptococcus agalactiae cause?
Which Lancefield group ranks next to group A in causing human disease?
Which Lancefield group ranks next to group A in causing human disease?
What is the characteristic growth pattern of Streptococcus pyogenes on blood agar?
What is the characteristic growth pattern of Streptococcus pyogenes on blood agar?
