Streptococcus pneumoniae Flashcards
1
Q
What is another name for streptococcus pneumoniae?
A
pneumococcus
2
Q
How does grow?
A
pairs of cocci (diplococci).
3
Q
Where is streptococcus pnuemonaie isplated from?
A
a major respiratory pathogen.
It can be isolated from the upper respiratory tract of 5 to 7 percent of normal adults.
4
Q
What does streptococcus pnumoniea cause?
A
most common cause of community-acquired pneumonia,
second most common pathogen in bacterial meningitis,
etiologic agent in more than one-half of cases of otitis media in children.
5
Q
How does streptococcus pnumonaie cause disease?
A
avoids host defense
multiplies in host tissue
has very few toxins
6
Q
What is the morphology of streptococcus pnuemonaies?
A
Gram-positive lancet-shaped diplococcus also grows in short chains capsulated non-motile nonsporulating
7
Q
what is the colony morphology of streptococcus pnuemoniae?
A
alpha hemolytic smooth (encapsulated) rough (non encapsulated) autolysis after 48 hours full autolysis after 72 hours
