1
Q
What is MacConkey agar?
A
MacConkey agar is a differential and selective media which is mainly used to identify different gram-negative bacteria based on their ability to metabolise lactose.
2
Q
What is the basis of MacConkey agar?
A
The basis of MacConkey agar is that it contains bile salts and crystal violet that inhibit the growth of gram-positive bacteria whilst also containing lactose which can be utilised by lactose fermenters to produce products that will acidify the media, detected by the pH indicator neutral red, turning the media a shade of red.
Laboratory media and tests.
flashcards
Decks in class (34)
# Cards
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Differential and selective media.2
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Chromogenic agar.2
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MacConkey agar.2
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Blood agar.2
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Chocolate agar.2
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EMB agar.2
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SS agar.2
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Mannitol salt agar.2
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Hektoen agar.2
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M-tergitol 7 agar.2
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XLD agar.2
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CLED agar.2
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SDA agar.2
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Citrate agar.2
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Urea agar.2
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Nutrient agar.2
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Media solidity.4
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Gram staining.2
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Morphology observation2
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Motility testing.2
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Indole utilisation testing.2
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Methyl red testing.2
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Voges-Proskauer testing.2
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Citrate utilisation testing.2
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H2S production testing.2
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Glucose fermentation testing.2
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Catalase testing.2
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Oxidase testing.2
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Gelatine hydrolysis testing.2
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Urea hydrolysis testing.2
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Nitrate reduction testing.2
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Sterility testing.6
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Bioburden assessments.7
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Endotoxin testing.2
