Inquiry Science 9 March 2, 2012 Inquiry Science 9 ET # 53: a) What is the difference between a disease causing agent and a disease vector? b) List all of the ways infectious diseases are transmitted. 1.Work on Infectious Diseases Project - Presenting next class Homework: Prepare for Presentation SCR #53: MRSA Tick – Lyme Disease Polio victim in Iron Lung Cholera patients Mosquito – Malaria, West Nile Virus Mouse – Hanta Virus Ring worm

ET # 53: What is the difference between a disease causing agent and a disease vector? A disease causing agent is the thing that actually gets inside and causes the disease: Examples: Viruses Bacteria Nematodes (worm-like, ex. hookworms, tape worms, heart worms) Protists (various single-celled protozoans)

A disease vector is the living thing that spreads or transmits the disease (but doesn’t cause the disease: Examples: Mosquitoes Rats/mice Ticks Birds Humans!

ET # 53: List all of the ways infectious diseases are transmitted. droplet contact - coughing or sneezing on another person direct physical contact - touching an infected person, including sexual contact indirect contact - touching a contaminated surface (ex. door knob, faucet) airborne transmission - if the microorganism can remain in the air for long periods fecal-oral transmission - from contaminated food or water sources vector borne transmission - carried by insects or other animals

PowerPoints Save your copy in: Public/All/Hagen Science 9/Infectious Disease PowerPoints/Period #/ Your group members last names You Must Save File by 2:10 pm

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