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Viral Diseases Viral Diseases

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Viral Diseases Viral Diseases Powered By Docstoc
					Viral Diseases
    Mrs. Cheifetz
Anatomy of a Virus
• Capsid
   – Head of virus with
     protective protein coat
• Nucleic Acid
   – Supplies code for
     replication and spread of
     the virus
• Body
   – Rod
   – Sheath
• Tails
   – Spikes which help virus     Credit: Virtual Virus Team

     latch onto its host cell
Viral Replication




         Credit: MSN Encarta
Viral Replication




         Credit: Dr. R. E. Hurlbert
Flu Virus
• Type A
  – Thought to be cause of epidemics in
    1918, 1957 and 1968
  – Ducks, chickens, pigs, whales and
    some humans
  – Most potent




                                  Influenza A Virus
             Credit: National Institute of Allergy and Infectious Diseases
Flu Virus (continued)
• Type B
  – Humans
  – Most common


• Type C
                            Credit: Massachusetts General Hospital



  – Humans, pigs, dogs
  – Mild respiratory infection
  – Non-epidemic
Pandemics
• 1918 World-wide Influenza
  Pandemic

 United
 States
  Flu
 Cases
 1918
Pandemics (continued)
• 1957 Asian Flu

• 1968 Hong Kong Flu




  Credit: International Council for Canadian Studies   Credit: CBS News.com
Pandemics (continued)
• Current flu issues

                                                                 Credit: USA Today




                                                           Credit: Collin County Community
                                                                    College District
                 Credit: Laura Jean Wilcox
     http://www.ees.nmt.edu/~ljwilcox/travel/seasia.html
Vaccines and Immunization




             Listen first, then watch!
Brain Pop Links
• Virus Video
  http://www.brainpop.com/health/dise
  asesandconditions/viruses/

• Flu Video
  http://www.brainpop.com/health/dise
  asesandconditions/fluandfluvaccine/
Reference List
•   Centers for Disease Control. (2005) “Information About Influenza Pandemics.” Viewed Oct. 20,
    2005 from http://www.cdc.gov/flu/avian/gen-info/pandemics.htm .
•   Hurlbert, Dr. R. E. (1999) “Introduction to Viruses.” Viewed Oct. 17, 2005 from
    http://www.slic2.wsu.edu:82/hurlbert/micro101/pages/Chap11.html.
•   MSN Encarta. (2005) Viral Replication. Viewed Oct. 15, 2005 from
    http://encarta.msn.com/media_461520267_761575740_-1_1/Viral_Replication.html.
•   MSN Encarta. (2005) Viral Structure. Viewed Oct. 15, 2005 from
    http://encarta.msn.com/media_461516649_761575740_-1_1/Viral_Structure.html.
•   National Institute of Allergy and Infectious Diseases. (2005) Focus on the Flu. Viewed Oct. 16,
    2005 from http://www3.niaid.nih.gov/news/focuson/flu/research/primer/default.htm.
•   National Vaccine Program Office. (2004) “Pandemics and Pandemic Scares in the 20 th Century.”
    United States Department of Health and Human Services. Viewed Oct. 20, 2005 from
    http://www.os.dhhs.gov/nvpo/pandemics/flu3.htm .
•   PBS/WGBH. (1999) “Influenza 1918.” The American Experience. Viewed Oct. 20, 2005 from
    http://www.pbs.org/wgbh/amex/influenza/ .
•   Virtual Virus Team. (1997) “How Do They Function?” ThinkQuest. Viewed Oct. 17, 2005 from
    http://library.thinkquest.org/13373/work/func.htm.

				
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