PHMY 610 GRAM POS. COCCI PART 2 TEST
is strep. catalase positive or negative
negative
how does strep. grow
in chains
which strep. species is diplococci
strep. pneumoniae
which strep species is an encapsulated
strep. Pneumonia
where do strep. species live naturally
through GI tract (also sinuses, inner ear, and skin)
what does beta hemolysis mean
complete hemolysis
beta hemolysis is caused by what?
hemolysins O and S (S = stable in oxygen)
what strep species are beta-hemolytic
Group A (S pyogenes)
Group B (S agalactiae)
Group C and G
what does alpha hemolysis mean
partial aka green hemolysis
what is alpha hemolysis caused by
hydrogen peroxide produced by the bacterium oxidizes the hemoglobin
, which strep species are alpha hemolytic
Viridans strep species and strep. pneumoniae
where do viridans strep species commonly live
mouth
what is S. pneumoniae the most common cause of
community acquired pneumonia and community acquired meningitis
(alongside otitis media)
T/F: S. pneumoniae is ALWAYS alpha hemolytic
false
what does gamma hemolysis mean
no hemolysis
what strep species is gamma hemolytic
S. bovis
what is lancefield grouping based on
carbohydrate antigens on strep surface
what is group A strep
Streptococcus pyogenes
what is group B strep
Streptococcus agalactiae
T/F: group D strep formerly included what are now considered enterococcus
species
true
which viridans strep species doesn't follow the rules and is usually non-
hemolytic (gamma hemolytic)
S. bovis
is strep. catalase positive or negative
negative
how does strep. grow
in chains
which strep. species is diplococci
strep. pneumoniae
which strep species is an encapsulated
strep. Pneumonia
where do strep. species live naturally
through GI tract (also sinuses, inner ear, and skin)
what does beta hemolysis mean
complete hemolysis
beta hemolysis is caused by what?
hemolysins O and S (S = stable in oxygen)
what strep species are beta-hemolytic
Group A (S pyogenes)
Group B (S agalactiae)
Group C and G
what does alpha hemolysis mean
partial aka green hemolysis
what is alpha hemolysis caused by
hydrogen peroxide produced by the bacterium oxidizes the hemoglobin
, which strep species are alpha hemolytic
Viridans strep species and strep. pneumoniae
where do viridans strep species commonly live
mouth
what is S. pneumoniae the most common cause of
community acquired pneumonia and community acquired meningitis
(alongside otitis media)
T/F: S. pneumoniae is ALWAYS alpha hemolytic
false
what does gamma hemolysis mean
no hemolysis
what strep species is gamma hemolytic
S. bovis
what is lancefield grouping based on
carbohydrate antigens on strep surface
what is group A strep
Streptococcus pyogenes
what is group B strep
Streptococcus agalactiae
T/F: group D strep formerly included what are now considered enterococcus
species
true
which viridans strep species doesn't follow the rules and is usually non-
hemolytic (gamma hemolytic)
S. bovis
