Biofilms

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  • Created by: dionnej13
  • Created on: 14-10-16 18:23
Define a biofilm
A community of microoganisms adhered to a surface encased in an extracellular polymeric substance
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Topography is..
The arrangement of natural and artificial parts in a surface
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What may be competition for binding sites in biofilm adhesion?
Proteins
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Formation of a biofilm in an industry depends on..
Food matrix, cleaning policies, open surfaces, location
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The temperature, pH, attachment sites and nutrient content of a ________ can affect formation of a biofilm
surface
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Co-aggregation is..
when two species of micoorganisms adhere to eachother
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Biofilms form...
gradually
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the use of broad spectrum antibiotics leads to...
all of the answers are correct
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the four steps in biofilm establishment are...
conditioning, attachment, retention, metabolism
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The extracellular polysacharide matrix surrounding the microorganisms in the biofilm do what?
Provide protection from disenfectant, provide nurtients, provide reservoir for gene transfer and qourum sensing
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Intra quorum sensing occurs between
The same species
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The presence of albumin ________ the attachment of Pseudomonas to polystyrene
inhibits
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When grown with Pseudamonas, Monocytogenes adhered to a glass surface, ______ than when alone
Better
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Bacterial interaction with a surface relies on
flagella activiy and chemotaxis
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Which can remove a biofilm after the bacteria complexes with a surface?
scraping, scrubbing, chemicals
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Why can antibiotics not eradicate a biofilm?
Cell wall target (eg: beta lactam) can not be reached
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The environment of a biofilm is described as mostly ______ for the microorganisms involved
synergistic
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Other cards in this set

Card 2

Front

Topography is..

Back

The arrangement of natural and artificial parts in a surface

Card 3

Front

What may be competition for binding sites in biofilm adhesion?

Back

Preview of the front of card 3

Card 4

Front

Formation of a biofilm in an industry depends on..

Back

Preview of the front of card 4

Card 5

Front

The temperature, pH, attachment sites and nutrient content of a ________ can affect formation of a biofilm

Back

Preview of the front of card 5
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