http://www.ck12.org Chapter 1. Human Biology
FIGURE 1.109
Some diseases are spread by insects.
The type of mosquito shown here can
spread West Nile virus. The virus doesn’t
make the mosquito sick. The mosquito
just carries the virus from one person or
animal to another. The mosquito is a
vector.- Infectious diseases can be spread by a vector, an organism that carries pathogens from one person or animal
to another.
Practice
Use the resource below to answer the questions that follow.
- Infectious Diseaseat http://www.youtube.com/watch?v=oUMCKai3xp4 (5:00)
MEDIA
Click image to the left for more content.- What isYersinia pestis? What disease does it cause?
- What did Louis Pasteur discover about microorganisms? How was this discovery related to disease?
- What do pathogens have in common?
- What are ectoparasites? Where do they live? How do they differ from endoparasites?
- What group of fungi cause many diseases?
Review
- What is a pathogen?
- Explain why using insect repellent reduces your risk of developing Lyme disease.