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Selective
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Select growth of certain organisms and inhibit growth of others
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Differential
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Anything can grow
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Chocolate Agar
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Lyses sheep blood, fastidious
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Blood Agar
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Anything can grow
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Phenylethyl Alcohol Agar (PEA)
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selective for gram positive bacteria, inhibits gram - with phenylethyl alcohol
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Colistin Nalidixic Acid Agar (CNA)
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selective for gram positive bacteria, inhibits gram - with acid
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Modified Thayer Martin Agar (MTM)
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Selective for neisseria spp
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Mannitol Salt Agar (MSA)
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Selective for halotolerant spp> staph µcocci
Staph aureus turns yellow
Staph aureus turns yellow
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MacConkey Agar (MAC)
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Selective for gram -, lactose is the diff. carb., E. Coli makes Agar hot pink
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Eosin Methylene Blue Agar (EMB)
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Selective for gram -, lactose is the diff. Carb.
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Hektoen Enteric Agar ( HEK)
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Salmonella growth, bile salts inhibit gram +, selective for gram -
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Xylose Lysine Desoxycholate Agar (XLD)
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Selective of gram -, lactose/sucrose/xylose diff. carb.