Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
|
What type of fermentation is Gemella?
|
Homofermentative
|
|
|
Gemella is catalase (-,+)
|
negative
|
|
|
Streptococcus
|
Homofermentative, Facultative anaerobes, growth stimulated by CO2
|
|
|
Streptococcus are catalase +,-?
oxidase +,-? |
Catalase negative
Oxidase negative |
|
|
How else can streptococcus be classified?
|
Hemolysis (a,B,y)
Carbohydrate cell wall antigens |
|
|
Which type of hemolysis is partial, and what color is it on a RBC plate?
|
alpha. Green halo around the colony on RBC plate.
|
|
|
Which two hemolysins contribute to BEta Hemolysis, and what do they do?
|
Streptolysin O - antigenic, Oxygen sensitive. Binds to RBC cholesterols.
Streptolysin S - nonantigenic, oxygen stable. Binds to RBC phospholipids. |
|
|
Which species of Streptococcus test for Alpha Hemolysis?
|
S. pneumoniae
S. salivaris |
|
|
Which Strep species test for gamma hemolysis?
|
S. bovis
E. faecalis |
|
|
Which Group of streptococcus test positive for CAMP factor?
How do you know? |
Group B Streptococcus, B-hemolytic.
It forms an arrow an the agar. |
|
|
What is CAMP Factor?
|
Extracellular factor that enhances hemolysis
|
|
|
Which streptolysin is primarily responsible for B hemolysis seen on Blood agar Plates?
|
Streptolysin O
|
|
|
what is the function of lipotechoic acid in streptococcus?
|
mediates oral and skin epithelial attachment and colonization.
|
|
|
which types of DNAse does Group A strep have?
|
B,A,C,&D
|
|
|
What are Pyrogenic toxins? And what does it cause?
|
Erythrogenic toxins.
scarlet fever and rash |
