12 Questions
Which characteristic is NOT true about Streptococci?
Catalase-positive
Which Streptococcus group grows at 10°C and 37°C?
Lactic Group
What is the characteristic hemolytic pattern of Alpha-hemolytic Streptococci?
Partial/Incomplete hemolysis
Which Streptococcus species requires capnophilic conditions for growth?
S. pneumoniae
What enhances the growth of Streptococci on agar plates?
Blood, serum, or glucose
Under what conditions do Enterococcus Group Streptococci grow?
At 10°C, 45°C, and 37°C
Which classification system is based on the extraction of C carbohydrate from the streptococcal cell wall?
Lancefield Classification
Which Streptococcus species is classified under Lancefield Group A as Beta-hemolytic?
Streptococcus pyogenes
What is the principal virulence factor for Streptococcus pyogenes?
M PROTEIN
How is Streptococcus pyogenes primarily acquired by humans?
Contaminated droplets released during coughing or sneezing
Which Streptococcus species is considered a 'fever-producing and flesh-eating bacterium'?
Streptococcus pyogenes
Why is the Lancefield Classification mostly significant in classifying and identifying beta-hemolytic streptococci?
Due to the presence of specific antigens in the streptococcal cell wall
Explore the key features of bacteria belonging to the Streptococcaceae family such as gram-positive cocci in chains, catalase-negative, and facultative anaerobes. Learn about their colony appearance and other distinguishing characteristics.
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