Group A Streptococci
Über den Vortrag
Der Vortrag „Group A Streptococci“ von Vincent Racaniello, PhD ist Bestandteil des Kurses „Bacteria“.
Quiz zum Vortrag
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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Dozent des Vortrages Group A Streptococci
Vincent Racaniello, PhD
Dr. Vincent Racaniello is a Higgins Professor of Microbiology and Immunology at Columbia University, in New York, USA.
He obtained his PhD at Mount Sinai School of Medicine, in New York City, in 1979 and joined the faculty of Columbia University in 1982.
Because of his achievements, he has received several awards, including the Irma T. Hirschl, Searle Scholars Program, Eli Lilly, and NIH Merit Awards. Dr. Racaniello is interested in using new media for medical education; he writes on his virology blog and hosts and produces several podcasts.
Within Lecturio, Dr. Racaniello teaches courses on Microbiology.
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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.
