2. Review from last Week

3. infectious disease disease that can pass from one organism to another

4. organism that can cause disease pathogen

5. 4 major groups of human pathogens 1. bacteria 2. viruses 3. fungi 4. protists

6. Pictures Of Strep Throat Here are three pictures of strep throat. Notice the red flecks indicating a bacterial infection.

7. 1. bacteria 11 celled microorganisms pproduce toxins (poisons) ddiseases caused by bacteria: strep throat- streptococcus bacteria tetanus

8. Infectious Diseases Caused by Bacteria [03:07]

9. 2. viruses smaller than bacteria cannot reproduce unless inside living cells

10. 2. viruses chicken pox diseases caused by viruses: – cold – influenza (flu) – chicken pox

11. 3. Fungi Yeast and Molds –Usually single celled

12. 3. fungi molds, yeasts athlete’s foot

13. Fungal Disease Ringworm Asthma Allergies Skin infections

14. sources of pathogens 1. person  person 2. contaminated object 3. animal bite 4. environment

15. 1. person to person transfer thru direct physical contact –kissing, shaking hands thru indirect contact –sneezing

16. 2. contaminated objects towels water food silverware

17. 3. animal bites

18. Vectors An organism that transmits disease. Vector acts as a carrier or transporter

19. Vector malaria The Anopheles mosquito carries the protist that causes malaria.

21. rabies

22. The Lyme disease bacterium, Borrelia burgdorferi, normally lives in mice, squirrels and other small animals.Borrelia burgdorferi It is transmitted among these animals – and to humans -- through the bites of certain species of ticks.

24. engorged deer tick

25. 4. environment soil water