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Micro presentation 1

Micro presentation 1

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  • 1. Microbe Challenge July 25, 2011 Sloan C Workshops Vimlarani Chopra, PhD
  • 2. Objectives
    • What is microbiology?
    • What are microorganisms?
    • How tiny are bacteria?
    • How do we identify microorganisms?
    • Are they our friends or foes?
    • Are they present every where?
    • What are some disease causing organisms?
  • 3. Microbiology
    • The study of organisms too small to be seen without magnification
    • Microorganisms include:
      • Bacteria (unicellular)
      • Viruses (acellular)
      • Fungi (multicellular)
      • Protozoa (unicellular)
      • Helminthes (worms)
      • Algae (multicellular)
      • 10, 000 to 500,000 X
  • 4. How tiny is bacteria?
    • An individual bacterium is very tiny.
    • One or two micrometers across.
    • Micro means 1/000,000 (one-millionth), they are commonly one millionth of a meter in diameter.
    • A meter is 39.37 inches (3.33 inches longer than a yard).
    • How many bacteria lying snugly side-by-side would it take to reach one meter?
    • About one million lying side by side to reach one meter, or 500,000 if they were 2 micrometers wide.
    • Bacteria divide every 12 to 20 minutes (1:2:4:8...........).
  • 5. Microbial Dimensions
    • Microorganisms are measured in micrometers.
    • Viruses are measured in nanometers
    • Worms are measured in millimeters.
    • 300 years of contributions
  • 6. Study of Microorganisms
    • Identification of Bacteria
    • Stain the bacteria
    • Three shapes
    • Culture Bacteria
    • Use DNA based tools
    • Binomial (scientific) nomenclature
    • Naming Bacteria
    • Gives each microbe 2 names:
      • Genus - noun, always capitalized
      • species - adjective, lowercase
    • Both italicized or underlined
      • Staphylococcus aureus (S. aureus)
      • Bacillus subtilis (B. subtilis)
      • Escherichia coli (E. coli)
  • 7. Antonie van Leeuwenhoek (1632-1723)
    • First to observe living microbes
    • Single-lens magnified up to 300X
    • Disproved the early belief that some forms of life could arise from vital forces present in nonliving or decomposing matter (flies from manure, etc)
  • 8.
  • 9. Louis Pasteur (1822-1895)
    • Many diseases are caused by the growth of microbes in the body and not by sins, bad character, or poverty, etc.
    • Showed microbes caused fermentation and spoilage
    • Developed pasteurization
    • Demonstrated what is now known as Germ Theory of Disease
    • Developed a rabies vaccine
  • 10. What do Microorganisms do?
    • Live on astonishing variety of places and live on every food you can imagine
    • Nutrient production and energy flow
    • Decomposition
    • Biotechnology
      • production of foods, drugs and vaccines
    • Genetic engineering
    • Bioremediation
    • Infectious disease world wide
    • 2000 microbes
    • 10 B new infections / year
    • 13 M deaths from infections / year
  • 11.
    • How to grow bacteria?
    • How to grow bacteria colonies?
    • How to count bacteria?
    • Study the effect of pH on household bacteria.
    • Study the effect of temperature on bacteria growth.
    • Study the effect of antibiotics on bacteria count.
    • Study the effect of light on bacteria growth.
    • Study the effect of UV light on bacteria growth?
    • Study Bacteria classification. 
    • How can we control the growth of anaerobic bacteria?
    • How can we control the growth of aerobic bacteria?
    • Study the effect of different nutrients on bacteria growth.
    • How fast do the bacteria grow?
  • 12. Conclusion
    • All microorganisms are not disease causing microbes commonly known as pathogens.
    • Many are our dear friends recycle waste matter and help us salvage our mother Earth.
    http://en.yupis.org/game-YIPy/#play http://en.yupis.org/games/viral-vendetta/
  • 13. Have a Nice Day!    Thank You                              http://www.youtube.com/watch?v=tqOVYpkZ0qs&feature=related                                      