Virus

1
Virus

• Abigail Claeys
• Ingrid McCallister
• Dustin Culp

2
The First Virus

• Founded in 1898 by Friedrich Loeffler and Paul
  Frosch
• Caused a foot and mouth disease

3
Basic Facts

• Viruses are the tiniest, simplest life forms.
• They are considered to be non-living.
• Viruses depend on their host cells to reproduce.
• Viruses are named after the disease they cause.

4
Virus Shapes

• Viruses are too small to BE SEEN WITH A LIGHT
  MICROSCOPE.
• Shapes Include
• Rods
• Filaments
• Spheres
• Cubes
• Crystals
• Tadpole

5
Virus structure

• Made up of an inner core and protein coat.
• Inner core contains dna or rna
• The protein coat is a protective layer
  surrounding the genetic material

6
Reproductive cycles

• There are two reproductive cycles, lytic and
  lysogenic.
• During both cycles the virus injects the host
  cell with genetic material.
• Lysogenic cycle will turn into a lytic cycle
• Ex
• Hiv to aids
• Chicken pox to shingles

7
Lytic reproductive cycle

• Virus destroys the host cells dna.
• The virus reprograms the cells metabolic process
  to copy the viral genes.
• Many copies of the virus are then made by the
  host cell and eventually the host cell bursts

8
Lysogenic reproductive cycle

• The viral dna becomes a part of the host cells
  dna.
• With each mitotic division of the cell, the viral
  dna is copied and contained in the new cells.

9
Common viruses

• Common cold
• Polio
• Mononucleosis
• Flu
• Rabies
• Ebola
• Chicken pox
• Rubella
• Hiv/ aids

10
Prevention/ treatment

• Most viruses can be avoided with the proper
  vaccination.
• Over-the-counter drugs can be used to help
  relieve viral symptoms.
• Other forms of treatment have been experimented
  with and are still in the making.

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The end