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9 Cards in this Set
- Front
- Back
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Are streptococci gram-positive or gram-negative?
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gram positive
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What is the major morphological difference between Staphylococcus and Streptococcus?
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Staph is arranged in clusterspt
Strep is arranged in chains |
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What is alpha hemolysis?
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partial lysis of red blood cells around a colony
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What is beta hemolysis?
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complete lysis of red blood cells around a colony
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What type of agar plate is used to demonstrate hemolysis?
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blood agar plate
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Name one antimicrobial agent that is used to distinguish between groups of alpha-hemolytic Streptococcus.
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optochin
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Name the antimicrobial agents that is used to distinguish between groups of beta-hemolytic Streptococcus. 2
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bacitracin
SXT |
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Inoculation of bile esculin agar is done to test for what chemical process?
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hydrolysis (of bile esculin)
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Describe what a positive bile esculin test looks like
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blackening of the slant
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