ex 10: Types of Media

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7 Terms

1
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supportive media

contains nutrients to grow most types of bacteria

  • general purpose media

2
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selective media

encourages the growth of one type of organism

  • while inhibiting others

3
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differential media

allows to distinguish between different organisms

  • based on growth

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TSA/NA media

supportive media

  • nutrient agar

  • grows many bacteria

  • general purpose

  • clear

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CNA media

selective media

  • selects Gram + cocci

  • red

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MAC media

both selective and differential

  • selects for Gram -

  • contains lactose that distinguishes bacteria that can ferment lactose and those that doesn’t use it

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appearance of colonies for MAC media

red/pink: lactose fermenters

colorless: no lactose fermenters