10 Questions
What is the drug of choice for the treatment of Streptococcus pyogenes infections?
Penicillin G
Which test is used to confirm the identity of Streptococcus pyogenes?
Lancefield grouping and biochemical testing
What is the Lancefield group of Streptococcus pyogenes?
Group A
Which test is used to differentiate Streptococcus pyogenes from other streptococci?
PYR test
Which surface proteins are used to further differentiate strains of Streptococcus pyogenes?
M, R, and T proteins
What is the primary source of Streptococcus agalactiae (Group B Streptococcus) in humans?
Perineal and vaginal flora
How can Streptococcus agalactiae (Group B Streptococcus) be transmitted?
Transvaginal and transplacental transmission
Which of the following is a characteristic of the colonial morphology of Streptococcus pyogenes?
Beta-hemolytic
What is the microscopic appearance of Streptococcus pyogenes?
Gram-positive cocci in chains
What is the purpose of long-term antibiotic prophylaxis in patients with a history of rheumatic fever?
To prevent recurrence of rheumatic fever
Test your knowledge on streptoccocci virulence factors including pathogenicity, bacterial adhesion to teeth and heart valves, acid production, and vegetation formation. Learn about how various carbohydrates facilitate attachment and the role of glycocalyx in enhancing adhesion.
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