5 Questions
Which test could aid in the identification of Streptococcus pyogenes?
PYR test (positive)
A B-hemolytic, catalase-negative, gram-positive coccus resistant to bacitracin and sulfamethoxazole is likely to be:
Group A streptococci
The CAMP test is based on enhanced hemolysis between CAMP factor and B-lysin from:
Streptococcus agalactiae
A nonhemolytic, catalase-negative, gram-positive coccus that is PYR positive is also expected to be:
Both a and b
The optochin test is most valuable in the identification of:
Both a and b
Study Notes
Identification of Streptococcus pyogenes
- B-hemolytic, catalase-negative, gram-positive coccus resistant to bacitracin and sulfamethoxazole is likely to be Streptococcus pyogenes.
CAMP Test
- The CAMP test is based on enhanced hemolysis between CAMP factor and B-lysin from Staphylococcus aureus.
Identification of Streptococcus pneumoniae
- A nonhemolytic, catalase-negative, gram-positive coccus that is PYR positive is also expected to be Streptococcus pneumoniae.
Optochin Test
- The optochin test is most valuable in the identification of Streptococcus pneumoniae.
Test your knowledge of clinical bacteriology by identifying three tests useful for the identification of Streptococcus pyogenes. Explore key characteristics and diagnostic methods for this pathogen.
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