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21 Cards in this Set
- Front
- Back
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3 ways to ID bacteria
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-biochemical (metabolic) testing
-immunological (antibodies) testing -genetic (PCR) testing |
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media where some bacteria grow and some don't
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selective media
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media that favors/encourages certain bacteria
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enrichment media
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media that gives you additional information about organisms that grow on it
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differential media
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in mannitol salt, the high NaCl selects for __
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gram + bacteria
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in mannitol salt, the high NaCl selects against __
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gram - bacteria
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staphylococcus aureus ferments mannitol and turns the solution __ with pH indicator phenol red
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yellow
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EMB selects for __
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gram -
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EMB inhibits __
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gram +
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the differential in EMB (eosin methonal blue) is __
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lactose
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bacteria uses __ to break down lactose
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beta-galactosidase
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when bacteria ferment EMB it turns
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green
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ie lactose and sucrose
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disaccharides
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ie startch
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polysaccharides
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bacteria excrete __ (an exoenzyme) to digest startch
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amylase
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in a statch augar plate, a clear ring around smear indicates __
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the abscense of startch
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the inverted tube that traps gas in a liquid culutre
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durham tube
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what is the concentration of sugars in a tripple sugar iron augar medium?
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glucose 1x
sucrose 10x lactose 10x |
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the iron reagent in triple sugar augar iron agar detects __
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H2S
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what does a yellow butt indicate in a TSIA medium?
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glucose only is fermented
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what does it mean if the slant and butt are yellow in TSIA?
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glucose and sucrose and or lactose fermented
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