Gram Positive Bacteria (Streptococci) Flashcards
Streptococci are found in (chains/clusters)
chains
Staphylococci are found in (chains/clusters)
clusters
Streptococci is catalase (positive/negative)
negative
Staphylococci is catalase (positive/negative)
positive
What protein is found in streptococci pyogenes that contributes to its virulence factor?
M protein
How does the protein found in streptococci pyogenes work as its virulence factor?
Inhibits complement activation and phagocytosis
Besides the protein, what other virulence factor does streptococci pyogenes have?
Streptolysin O (oxygen labile) and Streptolysin S (oxygen stable)
What antigen is found on streptococci pyogenes?
Lancefield antigen A
What kind of shape is observed for streptococcus pneumoniae?
Diplococci
What antigen is found on streptococci pneumoniae?
No Lancefield type
What major disease does streptococci pneumoniae cause?
Pneumonia + meningitis in adults (otitis media in children)
What is the major virulence factor in streptococci pneumoniae?
Polysaccharide capsule
What major disease does streptococci pyogenes A cause?
Scarlet fever, rheumatic fever, streptococcal glomerulonephritis
What major disease does streptococci agalactiae cause?
Neonatal meningitis pneumonia and/or sepsis;
Sepsis in pregnant women too
What major disease does Viridans group streptococci cause?
Endocarditis, dental infections, and abscesses
