Biofilms Jim Goebl
A Biofilm
What are Biofilms? <ul><li>Biofilms are collections of microorganisms (ie bacteria, yeasts, and protozoa) that form on a h...
More about Biofilms <ul><li>Over 90% of all bacteria live in biofilms </li></ul>
Uses of Biofilms <ul><li>Often used to purify water in water treatment plants </li></ul><ul><li>Used to break down toxic c...
Problems Caused by Biofilms <ul><li>Tend to clog pipes and water filters </li></ul><ul><li>Can cause numerous diseases, in...
Formation of Biofilms <ul><li>Form in places with access to water </li></ul><ul><li>Attach to a solid surface using severa...
Altruism among microorganisms <ul><li>Biofilms encourage altruism </li></ul><ul><li>Bacteria will often sacrifice their ma...
Altruism continued <ul><li>Biofilms like small cities </li></ul><ul><li>Have many very close neighbors that remain togethe...
Simulation <ul><li>http://www.theobio.uni-bonn.de/people/jan_kreft/bacsim.html </li></ul>
Sources <ul><li>http:// www.edstrom.com/Resources.cfm?doc_id =23 </li></ul><ul><li>http://www.biofilm.org/whatis_biofilm.h...
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Biofilms

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Biofilms

  1. 1. Biofilms Jim Goebl
  2. 2. A Biofilm
  3. 3. What are Biofilms? <ul><li>Biofilms are collections of microorganisms (ie bacteria, yeasts, and protozoa) that form on a hard surface </li></ul><ul><li>Some examples of biofilms are the plaque that forms on teeth and the slime that forms on surfaces in watery areas </li></ul><ul><li>Surrounded by slimy secretions </li></ul>
  4. 4. More about Biofilms <ul><li>Over 90% of all bacteria live in biofilms </li></ul>
  5. 5. Uses of Biofilms <ul><li>Often used to purify water in water treatment plants </li></ul><ul><li>Used to break down toxic chemicals </li></ul><ul><li>Used to produce useful biological compounds, including medicines </li></ul>
  6. 6. Problems Caused by Biofilms <ul><li>Tend to clog pipes and water filters </li></ul><ul><li>Can cause numerous diseases, including many diseases prevalent in hospitals </li></ul><ul><li>Extra-resistant to antibiotics </li></ul><ul><li>Can form almost anywhere that water is present, including catheters, kitchen counters, etc. </li></ul>
  7. 7. Formation of Biofilms <ul><li>Form in places with access to water </li></ul><ul><li>Attach to a solid surface using several means: </li></ul><ul><li>Flagella </li></ul><ul><li>Hydrophobic Cell Walls </li></ul><ul><li>Sticky Polymers </li></ul>
  8. 8. Altruism among microorganisms <ul><li>Biofilms encourage altruism </li></ul><ul><li>Bacteria will often sacrifice their maximum growth rate in an effort to use the available community resources more efficiently </li></ul><ul><li>While individuals are disadvantaged, community as a whole benefits </li></ul>
  9. 9. Altruism continued <ul><li>Biofilms like small cities </li></ul><ul><li>Have many very close neighbors that remain together for extended periods of time </li></ul>
  10. 10. Simulation <ul><li>http://www.theobio.uni-bonn.de/people/jan_kreft/bacsim.html </li></ul>
  11. 11. Sources <ul><li>http:// www.edstrom.com/Resources.cfm?doc_id =23 </li></ul><ul><li>http://www.biofilm.org/whatis_biofilm.htm </li></ul><ul><li>http://www.biofilmsonline.com </li></ul><ul><li>Kreft, Jan-Ulrich. “Biofilms Promote Altruism.” Microbiology (2004), 150. 2751-2760. </li></ul>

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