Quiz Gram positive cocci of medical importance

Viridans Streptococci commonly cause

 

subacute endocarditis

(?) hemolysis is the partial lysis of red blood cells due to bacterial hemolysis

alpha

Which microbe causes streptococcal pharyngitis (strep throat)?

 

S. pyogenes

Rheumatic fever damages the (?), and glomerulonephritis damages the (?)

 

heart valves, kidney

Which is the major virulence factor for Streptococcus pneumoniae? Without it the organism can not cause disease.

 

capsule

Which pathogen causes toxic shock syndrome?

 

Staphylococcus aureus

How does Staphylococcus aureus cause gastrointestinal symptoms?

 

by producing enterotoxins when growing in food

The most severe streptococcal diseases are caused by

 

Group A streptosocci

You can differentiate Staphylococcus from Streptococcus species based on which characteristic

 

Staphylococcus produces catalase

Which Gram-positive coccus is part of the normal flora of the human skin but can cause opportunistic infections?

 

Staphylococcus epidermidis

The symptoms of scarlet fever are due to

 

erythrogenic toxin

All of the following are correct about Streptococcus pyogenes, EXCEPT

 

it causes scalded skin syndrome

Otitis media is a/ an (?) infection often caused by

 

middle ear, Streptococcus pneumoniae

Which of the following diseases is commonly caused by Streptococcus agalactiae (Group B Streptococcus)?

 

Neonatal meningitis

Which of the following is a Gram-positive coccus commonly associated with skin infections?

 

Staphylococcus aureus

All of the following are correct about Streptococcus pyogenes, EXCEPT

 

it causes scalded skin syndrome

All of the following are correct about Staphylococcus aureus, EXCEPT:

 

it is a common cause of strep throat

The primary virulence factor of Streptococcus pyogenes that helps in evading phagocytosis is:

 

M protein

Which Gram-positive coccus is part of the normal flora of the human skin but can cause opportunistic infections?

 

Staphylococcus epidermidis