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Viruses. “They Are Not Alive!”. Viruses. Non-Living?. Viruses DO NOT : Metabolize on their own Reproduce Move Take in food Grow Consist of cells. What they can do is take a host cell “ Hostage”. Bacteriophage. Consist of a protein coat called a Capsid Contain Viral DNA

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viruses

Viruses

“They Are Not Alive!”

non living
Non-Living?

Viruses DO NOT:

  • Metabolize on their own
  • Reproduce
  • Move
  • Take in food
  • Grow
  • Consist of cells
bacteriophage
Bacteriophage
  • Consist of a protein coat called a Capsid
  • Contain Viral DNA
  • Special Ligands allow the virus to attach to the cell receptors of a host cell.
viral infection
Viral Infection

A virus can reproduce in two ways:

1.The Lytic Cycle: infects and affects the host cell very quickly. Flu, Ebola, Cold

2. The Lysogenic Cycle: infects but does not affectimmediately HIV, Herpes

the lysogenic cycle
The Lysogenic Cycle

INCUBATION PERIOD

lytic cycle animation
Lytic Cycle Animation
  • Lytic Cycle #2
  • Virus Attack
  • H1N1
  • Lytic Infection PH
viral infections
Viral Infections
  • Small Pox
  • Chicken Pox
  • Herpes
  • Hanta
  • Mumps
  • Measles
  • Polio
  • Hepatitis
  • West Nile
  • Corona
  • Encephalitis
  • Influenza
  • Meningitis
  • Ebola
  • HIV
  • Lassa Fever
  • Mononucleosis
  • Rabies
  • Dengue Fever
  • Yellow Fever
  • H1N1 (Swine Flu)
vaccines
Vaccines
  • Vaccines are used to establish immunity.
  • They can be made of weakened viruses or “dead” viruses.
  • The body recognizes and destroys the viruses. It will“remember” them so that the next time they are in the body, they will be destroyed.
  • Ex. The H1N1 Shot
more human viral diseases
More Human Viral Diseases
  • Chicken Pox
  • Mumps
  • Herpes
  • Hepatitis
  • Warts
  • How big are Viruses?
viroids and prions
Viroids and Prions
  • Viroids
    • Infections agents composed of a single, circular strand of RNA. They are not protected with a protein coat.
    • Viroid RNA does not code for any known protein.
    • Mostly affect plants but recently have been found to affect humans.
viroids and prions1
Viroids and Prions
  • Prions
    • An infectious particle made of protein
    • Affect the brain or neural tissue.
    • All are untreatable and fatal
    • Ex. Mad Cow Disease
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