Why do Microbes Always Win

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Why do Microbes Always Win?
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What are disease organisms?

• Any organism that produces impairment of the
  normal state or functioning of the body as a
  whole or of any of its parts.

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Bacteria

• Prokaryotic organisms effected by antibiotics.

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Bacterial Chromosomes and Plasmids

• Chromosome is made up of the DNA.
• A plasmid is extrachromosomal elements composed
  of circular double-stranded DNA.

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Reproduction
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The 3 ways of Bacterial Genetic Exchange

• Conjugation
• Transduction
• Transformation

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Conjugation

• Bacteria use pili for attachment
• Genetic material is transferred through the pili
  from one cell to another in a one way transfer
  from male bacteria to female recipient.

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Transformation

• Bacteria can exchange genetic material in a
  variety of ways, the most amazing being
  transformation - the transfer of genetic material
  from one bacterium to another through the liquid
  in which the bacteria live. Think of it as
  analogous to a person being able to pick up new
  genes from someone who has sneezed into the air
  across the room from them.

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Transformation

• Plasmids can be exchanged between bacterial cells.

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Transduction

• Transduction. Bacteria, like humans, can be
  attacked by viruses. These bacterial viruses are
  known as bacteriophages. These bacteriophages
  invade bacteria, and can change their DNA. They
  may also carry DNA from one bacterium to another.
  These actions alter the genotype of the
  bacterium. This process is known as Transduction.

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Antibiotic Resistance
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Types of natural selection
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Doubling Time

• The time it takes for a cell to fully divide.

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Flesh Eating Bacteria!

• Eww!
• Streptococcus pyogenes
• The only effective treatment is amputation.

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How does a virus infect a cell?
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Diseases good and bad

• Some have been around.
• Some are brand new.
• Some know how to live with us.
• And some dont have a clue.

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References

• Virus http//ebiomedia.com/prod/images/virus.gif
• Virus animation http//www.cherrybyte.org/Article
  s/bugbytes/virus/flu20virus20animation.gif
• Bacteria http//www.sh.se/natur/research/edlund/b
  acteria.gif
• Bacteria Conjugation http//fig.cox.miami.edu/cm
  allery/150ss97/18x14.jpg
• Bacteria Fission http//biology.kenyon.edu/course
  s/biol14/slides/slides-1.html
• 3 ways http//www.medschool.lsumc.edu/Micr/mirror
  /public_html/bactnat/bact3sex.GIF
• Transduction http//microbiology.okstate.edu/facu
  lty/rum67/gentrans.gif
• Mad Cow http//www.rkm.com.au/BSE/prionimages/pri
  onriver300.jpg
• Flesh Eating Bacteria http//www.diseaseworld.com
  /necro.htm
• Natural Selection http//www2.bc.edu/strausse/su
  rvey/lecture_notes/02-05-02/image7.gif