General Characteristics Flashcards
Which is/are true about Enterococcus and Strptococcus?
A. Both belong to the family of Streptococcaceae.
B. Usually, arrage in pair/ chains
C. Catalase (-)
D. More elongated than spherical
All of the above
In what media is a weak false catalase(+) reaction can be observed in Streptococci?
Agar containing blood
T or F
Streptococcus appear chains in agar plate.
False- broth
T or F
Strep. And Ent. Behave like facultative aerobes.
False- facultative anaerobes
What are the end products of streptococcus?
Lactic acid w/o gas
T or F
Streptococcus spp. Grows well in nutrient media and grows poorly in enriched media (Blood, serum).
False- it grows well in enriched media
What are the characteristics of streptococcus colonies?
Smaller than staph. and transparent
T or F
Most streptococci, except viridans group have group C carbohydrates
True
Partially lysis of RBCs
Greenish color in media
Alpha hemolysis
Complete lysis of RBCs arood colony
Clear area around colony
Yellow color
Beta hemolysis
No lysis of RBCs
No change in agar
Gamma hemolysis
Small area of intact RBCs around colony surrounded by wide zone of complete hemolysis
Alpha prime hemolysis
What spp. Of streptococcus has the a’ hemolysis.
Viridans groups.
Streptococcus that is/are alpha hemolytic.
S. Pneumoniae
S. Viridans group
Strep. That is/are beta hemolytic.
S. pyogenes
S. agalactiae
