Term
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Definition
| aggregates of bacteria attached to a surface encased in a structured (3-D) polysaccharide matrix |
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Term
| How many different types of bacteria can be found in a biofilm production? |
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Definition
| It can be one type of bacteria or multiple species |
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Term
| What do the bacteria in the biofilm secrete? |
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Definition
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Term
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Definition
- Planktonic (free swimming) bacteria
- Bacteria become attached to surface
- Micro-colony is formed
- Polysaccharide matrix is secreted, encasing bacteria (sessile)
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Term
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Definition
| Different genes are expressed when bacteria are in planktonic vs. sessile state |
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Term
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Definition
| Use flagella and pilli to attach and move |
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Term
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Definition
| Supress the genes expressing for flagella and pilli and increase gene expression for polysaccharide and exopolysaccharide genes |
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Term
| Extracellular communication |
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Definition
| Quorum sensing affects whether biofilm form |
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Term
| Under what conditions will favor biofilm formation |
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Definition
| when cyclic di-GMP level is high |
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Term
| Less favorable conditions of biofilm formation? |
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Definition
| when cylic di-GMP level is low → planktonic state |
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Term
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Definition
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Term
| How is cyclic-di GMP broken down? |
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Definition
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Term
| What is the advantage of bioflim formation? |
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Definition
1. Due to close proximity increase frequency of lateral gene transfer (horizontal gene transfer) thru conjugation thus they are more resistant to antibiotic.
2. Can gain virulence factor |
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Term
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Definition
| teeth, rocks in streams, cathers/ IV, and water pipes |
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Term
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Definition
- although most bacteria are trapped, some planktonic bacteria can swim around.
- Growth rate decreases
- Decrease in susceptibility to antibiotics and detergents
- Bacteria can become planktonic by Lyase= enzyme that degraded polysaccharide
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Term
| what is the enzyme that degrades polysaccharide? |
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Definition
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