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9 Cards in this Set
- Front
- Back
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Define differential media |
Differentiates between different types of microbes based on growth and color changes. |
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Define selective media |
Contains dyes or toxic substances which inhibit the growth of certain microbes but support growth of others |
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Why is MacConkey agar selective as well as differential? |
To isolate and differentiate based on the ability to ferment lactose |
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Why is blood agar useful as a primary isolation medium? |
Mimics the human environment |
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What is the major difference between MTM medium and chocolate agar? |
Chocolate age is blood agar with red cells and some growth promoting agents. MTM is only used in genital cultures. Chocolate can be used in many cultures |
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If you wanted to isolate S aureus from a pus specimen containing a mixed flora what medium would you use to get results fast? Why? |
MSA |
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What is the value of making a gram stain directly from a clinical specimen? |
To differentiate the different organisms and determine what is normal flora and what's not |
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Why is aseptic technique important in the lab? Patient care? |
Minimizes contamination and cross contamination by different pathogens in pure cultures. Important to not infect patients with bacteria |
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Why is human blood no longer used is the preparation of culture media? |
Potential risk of blood borne Pathogens. HIV,Hep B |
