virus powerpoint
Upcoming SlideShare
Loading in...5
×
 

Like this? Share it with your network

Share

virus powerpoint

on

  • 13,135 views

 

Statistics

Views

Total Views
13,135
Views on SlideShare
13,135
Embed Views
0

Actions

Likes
4
Downloads
281
Comments
2

0 Embeds 0

No embeds

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
  • Great presentation. Precise and accurate without being over technical.
    Are you sure you want to
    Your message goes here
    Processing…
  • wow
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

virus powerpoint Presentation Transcript

  • 1. CHARACTERISTICS OF VIRUSES
  • 2. Are Viruses Living or Non-living?
    Biologists consider viruses to be non-living because:
    Are not cells
    Do not grow or respond to their surroundings
    Cannot make food, take in food, or produce wastes
    Viruses do not respond to stimuli.
    They can only multiply if in another living cell
  • 3. What are Viruses?Definition-
    Viruses are noncellular particles made up of genetic material and protein that can invade living cells.
  • 4. 4
    Discovery of Viruses
    Beijerinck (1897) coined the Latin name “virus” meaning poison
  • 5. 5
    Tobacco Mosaic Virus
    Wendell Stanley (1935) discovered viruses were made of nucleic acid and protein
  • 6. 6
    Smallpox
    Edward Jenner (1796) developed a smallpox vaccine using milder cowpox viruses
    Smallpox has been eradicated in the world today
  • 7. How Big is a Virus?
    Viruses are very small – smaller than the smallest cell.
  • 8. 8
    Characteristics
    Non living structures
    Non-cellular
    Contain a protein coat called the capsid
    Have a nucleic acid core containing DNA or RNA (one or the other - not both)
    Capable of reproducing only when inside a HOST cell
  • 9. 9
    Characteristics
    CAPSID
    Some viruses are enclosed in an protective envelope
    Some viruses may have spikes to help attach to the host cell
    Most viruses infect only SPECIFIC host cells
    DNA
    ENVELOPE
    SPIKES
  • 10. 10
    EBOLA VIRUS
    HIV VIRUS
    Outside of host cells, viruses are inactive
    Viruses cause many common illnesses/ diseases
    Some viruses may cause some cancers like leukemia
    Characteristics
    MEASLES
  • 11. 11
    Characteristics
    Viruses cause many common illnesses diseases
    Some viruses may cause some cancers like leukemia
    MEASLES
  • 12. What do Viruses look like?
    Viruses are unusual and different from other things in nature.
    Viruses come in a variety of shapes
    Some may be helical shape like the Ebola virus
    Some may be polyhedral shapes like the influenza virus
    Others have more complex shapes like bacteriophages
  • 13. 13
    Types of Viruses: Helical Viruses
  • 14. 14
    Polyhedral Viruses
  • 15. 15
    Complex Viruses
  • 16. 16
    Viral Taxonomy
    Family names end in -viridae
    Genus names end in -virus
    Viral species: A group of viruses sharing the same genetic information and ecological niche (host).
    Common names are used for species
    Subspecies are designated by a number
  • 17. 17
    Used for Virus Identification
    Morophology
    RNA or DNA Virus
    Do or do NOT have an envelope
    Capsid shape
    HOST they infect
  • 18. 18
    Herpes Virus
    SIMPLEX I and II
  • 19. 19
    Adenovirus
    COMMON COLD
  • 20. 20
    Influenza Virus
  • 21. 21
    Chickenpox Virus
  • 22. 22
    Papillomavirus – Warts!
  • 23. HOST SPECIFICITY
    All kingdoms can be infected by viruses
    Viruses are kingdom specific but they may or may not be species specific
    Spread is specific to the type of virus
  • 24. PARASITISM
    Viruses are parasites.
    A parasite is an organism that depends upon another living organism for its existence in such a way that it harms that organism.
  • 25. 25
    Bacteriophages
  • 26. 26
    Cylces
    Lysogenic Cycle
    Viral DNA
    May stay inactive in host for long periods of time
    Long lasting
    Example Mono or chickenpox
    LyticCylce
    Short and can be over come
    Example flu virus
  • 27. Vaccine
    Is a weaken form of the virus
    To expose your immune system to the virus which will allow your body to better fight off the virus when exposed to the full blow virus.
  • 28. Vector Control
    This is controlling the vectors that are carrying the virus.
    Examples:
    We stay home when sick, cover our mouth when we cough etc.
    We control the mosquito population in order to control the West Nile virus
  • 29. 29
    Other DrugTreatments
    Specific to certain viruses.
    They don’t cure the virus but they can slow down and inhibit the multiplication of the virus.
    copyright cmassengale
  • 30. Reducing the RiskThey can’t be treated but they can be prevented!
    Cover mouth/nose when you sneeze of cough
    Wash hands frequently
    Avoid contact with the body fluids
    Not foolproof but reduces the risks