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Infectious Disease

Infectious Disease

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Infectious Disease

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  1. Infectious Disease

  2. DO NOW • 10 Weird Health Clues

  3. Chapter 33 Open Note Quiz • On Page 972, answer questions 1, 3, 13-20, 23-28

  4. Homework due today • Read 35.1 • Answer Questions 1a, 1b, 2a on 1013 • Open note quiz

  5. Review Homework due today • List the types of organisms that can cause disease • Viruses • Bacteria • Fungi • Parasites

  6. Review Homework Due Today • What are the ways that pathogens can cause disease in their hosts? • Some viruses and bacteria directly destroy the cells of their host. Other bacteria release poisons that kill host cells or interfere with their functions

  7. Review Homework Due Today • What are the ways in which infectious diseases are spread? • Coughing, sneezing, physical contact, exchange of body fluids, contaminated water or food, infected animals

  8. Homework due next class • Read 35.2 • How does the body fight infection?

  9. Early diseases • People believed that diseases were from evil spirits and curses • “God bless you” • 1800s it was discovered that infectious diseases were caused from microorganisms that disrupt normal body functions • “Germs” • Germ Theory for disease

  10. “Germs” • No scientific meaning • Caused by: • Viruses • Bacteria • Fungi • Protists • Parasites • All known as Pathogens

  11. Pathogens

  12. Pathogens

  13. Pathogens

  14. Spread of diseases • Different for different diseases • Sneezing • Coughing • Physical contact • Exchange of body fluids • Infected animals • Droplets in the air/doorknobs • WASH YOUR HANDS!

  15. Spread of pathogens • Direct contact from host to host • Hepatitis can be caused by the sharing of syringes and drug use • Contaminated water/food • Infect digestive tract

  16. Homework due next class • Read 35.2 • How does the body fight infection?