Group A Streptococci
About the Lecture
The lecture Group A Streptococci by Vincent Racaniello, PhD is from the course Bacteria.
Included Quiz Questions
Which of the following is a characteristic of group A streptococci?
- They have multiple ways to avoid destruction by macrophage-like cells.
- They produce M and O streptolysins.
- Their movement in the body is restricted.
- They produce an enzyme that converts plasmin to plasminogen.
- They cannot produce the necessary proteases to digest host proteins.
Which of the following is NOT a common serious outcome of streptococcal infection?
- Permanent hoarseness
- Nonsuppurative sequelae
- Acute rheumatic fever
- Inflammation of heart tissue
- Polyarthritis
Strep throat is caused by which of the following pathogens?
- Group A streptococci
- Group B streptococci
- S. pneumoniae
- S. aureus
- Viridans streptococci
What is the morphology of streptococci seen on Gram stain?
- Gram-positive cocci in pairs or chains
- Gram-negative cocci in pairs or chains
- Gram-positive cocci in clusters
- Gram-negative cocci in clusters
- Gram-positive rods in pairs
Which of the following proteins is NOT produced by streptococci to enhance their ability to spread throughout tissues?
- Catalases
- DNAases
- Proteases
- Hyaluronidases
Why is streptokinase utilized to treat patients with strokes?
- It breaks down thrombo-emboli.
- It converts plasmin to plasminogen.
- It converts fibrin to fibrinogen.
- It breaks down extracellular DNA.
- It breaks down extracellular hyaluronic acid.
Which of the following is NOT a characteristic symptoms of acute rheumatic fever?
- Purulent abscesses
- Erythema marginatum
- Carditis
- Chorea
- Polyarthritis
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Author of lecture Group A Streptococci
Vincent Racaniello, PhD
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I liked how strep was broken down between group A and group B but the video didn't mention the different types of strep in each group ie s. pyogenes. The quiz asked about catalases but didn't mention it in the video.
