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Lab Quiz some number

QuestionAnswer
Why is optocin susceptibility used as a laboratory test to differentiate strep pneumoniae from other streptococci.
What is the chemical equation of the urease test? urea + H2O + Urease --> 2NH3 + CO2
How does the CAMP test work? Some Strep strains (group B) make "CAMP factor" that help other bacteria lyse RBCs better. If there is a large arrowhead shape of RBC lysis in yellow where the bacterial unknown crosses with the S. aureus, it is positive for the CAMP factor.
why use a CAMP test? to differentiate strep agalactiae from other Streptococci
How does MacConkey agar work? differential and selective medium contains lactose, bile salts, neutral red, and CV. bile salts and CV inhibit growth of G+. neutral red dye=pH indicator. colorless above 6.8 and red below 6.8. ferment lactose colonies turn pink.
How does optochin work (mechanism of action) disrupts ATP synthase activity
What is the CAMP factor? a hemolytic factor that acts synergistically with the beta-hemolysin of S. aureus.
what color is a positive urease test? pink
Created by: Kayla_K
 

 



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