Microbio culture types Flashcards

1
Q

MacConkey agar

A

grows many enteric bacteria

  • it’s a bile salt-containing agar that restricts growth of GP organisms
  • lactose fermenting organisms will appear purple
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2
Q

Thayer-Martin VCN medium

A

grow Neisseria species while prohibiting growth of other organisms

  • heated blood agar
  • vanco (to prevent GPs)
  • colistin/polymixin (to prevent GN’s)
  • nystatin (to prevent yeast)
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3
Q

Blood agar w/bile and hypertonic saline

A

cultures enterococci

- used to differentiate enterococci and nonenterococcal Group D streptococci

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4
Q

Bordet-Gengou medium

A

cultures Bordetella pertussis

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5
Q

Cysteine-tellurite agar

A

grows corynebacteria diphtheriae

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6
Q

enrichment media

  1. def
  2. examples
A
  1. media w/GFs needed to grow

2. X and V factors for Haemophilus or Anaerobic conditions for clostridium

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7
Q

differential media

  1. def
  2. examples
A
  1. differentiates by metabolic and biochemical properties
  2. MacConkey and EMB agars used to culture enteric organisms
    - organisms that ferment lactose appear purple on MacConkey and black on EMB
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8
Q

Reducing media

1. def

A
  1. used to culture organisms that reduce iron or sulfur as part of their metabolic pathways
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