CK12 Life Science

Lesson Summary

• Infectiousdiseasesarecausedbylivingthingsorvirusesthatcantravelfromoneperson
  to another.


• HIV causes AIDS by destroying disease-fighting cells produced by the immune system.


• A healthy lifestyle and frequent hand washing can help reduce your risk of infectious
  diseases.

Review Questions

1. Name two examples of infectious diseases.


2. What is a pathogen?


3. List three ways that pathogens can spread.


4. What is HIV?


5. What is the single most important way to avoid pathogens?


6. Why do antibiotics not cure the common cold?


7. Explain why covering your mouth when you cough helps prevent the spread of germs.


8. What role do vectors play in the spread of infectious diseases?


9. How does an HIV infection develop into AIDS?


10. Why might using insect repellent reduce your risk of Lyme disease?

Further Reading / Supplemental Links

• Jenna Bush. Ana’s Story: A Journey of Hope. Harper Collins, 2007.


• Scientific American. Germ Wars: Battling Killer Bacteria and Microbes. Rosen Pub-
  lishing Group, 2008.


• http://www.cdc.gov/ncidod/dvbid/westnile.htm


• http://www.mayoclinic.com/health/germs/ID00002http://www.cdc.gov/ncidod/
  EID/vol12no03/05-0955.htm;http://www.mayoclinic.com/health/germs/ID00002


• http://www.merck.com/mmhe/sec17/ch188/ch188a.htmlhttp://www.mayoclinic.
  com/health/infectious-disease/ID00004;http://www.merck.com/mmhe/sec17/ch188/
  ch188a.html


• http://www3.niaid.nih.gov/healthscience/healthtopics/microbes/PDF/microbesbook.
  pdf


• http://www.who.int/mediacentre/factsheets/fs094/en/index.htmlhttp://www.
  nlm.nih.gov/medlineplus/infectiousdiseases.html;http://www.who.int/mediacentre/
  factsheets/fs094/en/index.html


• http://en.wikipedia.org/wiki/West_nile_virus

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