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Questions and Answers
Which characteristic helps differentiate Group D streptococci from other genera?
Which characteristic helps differentiate Group D streptococci from other genera?
- Catalase positivity (correct)
- Capsule formation
- Beta-hemolysis on blood agar
- Loss of Gram-positive characteristic with age
What is a distinguishing feature of Group B streptococci (S. agalactiae) in biochemical tests?
What is a distinguishing feature of Group B streptococci (S. agalactiae) in biochemical tests?
- Beta-hemolysis on blood agar
- Alpha-hemolysis on blood agar
- Capsule formation (correct)
- Catalase positivity
How can Streptococcus pyogenes (Group A) be differentiated from other genera?
How can Streptococcus pyogenes (Group A) be differentiated from other genera?
- Gram-negative staining in old cultures
- Beta-hemolysis on blood agar (correct)
- Catalase negativity
- Alpha-hemolysis on blood agar
What distinguishes Streptococcus from other genera in terms of catalase reaction?
What distinguishes Streptococcus from other genera in terms of catalase reaction?
Which of the following is a characteristic feature of S. pneumoniae (pneumococci) for biochemical identification?
Which of the following is a characteristic feature of S. pneumoniae (pneumococci) for biochemical identification?
Which characteristic helps differentiate Streptococcus from Neisseria when considering Gram staining characteristics?
Which characteristic helps differentiate Streptococcus from Neisseria when considering Gram staining characteristics?
Which of the following statements is true regarding the differentiation of Staphylococcus species based on the coagulase test?
Which of the following statements is true regarding the differentiation of Staphylococcus species based on the coagulase test?
In the biochemical identification of Stomatococcus versus other families, which enzyme is used as a differentiating factor?
In the biochemical identification of Stomatococcus versus other families, which enzyme is used as a differentiating factor?
What is the characteristic result of the coagulase test for Staphylococcus aureus?
What is the characteristic result of the coagulase test for Staphylococcus aureus?
Which species among Staphylococci is sensitive to Bacitracin?
Which species among Staphylococci is sensitive to Bacitracin?
Which Staphylococcus species is resistant to Novobiocin?
Which Staphylococcus species is resistant to Novobiocin?
What is the key enzyme that is used to differentiate S.aureus from S.epidermidis and S.saprophyticus?
What is the key enzyme that is used to differentiate S.aureus from S.epidermidis and S.saprophyticus?
Which group of Streptococci is identified by a positive CAMP (Christie, Atkins, Munch-Peterson) test?
Which group of Streptococci is identified by a positive CAMP (Christie, Atkins, Munch-Peterson) test?
What biochemical test can differentiate between Group A Streptococcus pyogenes and other groups such as Enterococci?
What biochemical test can differentiate between Group A Streptococcus pyogenes and other groups such as Enterococci?
Which Streptococcus group shows sensitivity to bacitracin?
Which Streptococcus group shows sensitivity to bacitracin?
How is Streptococcus pneumoniae differentiated from viridans group Streptococci?
How is Streptococcus pneumoniae differentiated from viridans group Streptococci?
Which biochemical test can help identify Group B Streptococcus based on the production of a substance that enlarges the area of hemolysis?
Which biochemical test can help identify Group B Streptococcus based on the production of a substance that enlarges the area of hemolysis?
What differentiates all group D Streptococci from other groups in terms of bile esculin hydrolysis?
What differentiates all group D Streptococci from other groups in terms of bile esculin hydrolysis?
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