2. Corrie DiSalvo Diana Duque Kristin Hopkins Lizbeth Londono Marcela Morado Chapter 28 Lessons 1 & 3 7 th Grade

3. Infectious Diseases Diseases caused by the growth of pathogenic organisms in the body

4. Bacteria A single-celled microorganism Abundant in air, soil, and water Harmful Rapid Multiplication

5. Viruses Smallest known type of infectious agent One of the worst enemies (HIV) Unique Structure Invades all forms of life

6. Rickettsias Way of Multiplying Its Location Transmission Examples –Typhus and Rocky-Mountain spotted fever

7. Protozoans Single-celled organisms 30 different types Its Location

8. Fungi Simple organisms Saprophytes Prefers dark and damp environments Invasion sites –Ex: ringworms or athlete's foot.

9. Transmission Spread of infectious pathogens

10. People Direct contact –Ex. Hand shake, pregnant women to unborn child Indirect contact –Ex. Cough, sneeze

11. Animals Dogs –Rabies Mosquitoes –Malaria and dengue fever

12. Contaminated Objects Examples –Eating utensils –Glasses –Toothbrush –Door knobs –Pencils –Computer mouse

13. Environment Careless disposal of waste Careless handling of foods Pollution in air and water

14. What’s wrong with this picture?

15. Immune Response Nonspecific vs. Specific Resistance

16. Nonspecific Resistance Physical barriers –Mucus membranes and skin Chemical barriers –Tears, saliva, and acidic digestive juices Body cells –Phagocytes

17. Specific Resistance Lymphocytes –T-cells –B-cells Antibodies –Macrophages

18. Mission: Search and Destroy

19. Prevention Immunity and Immunization

20. Immunity Active Immunity –The defense system the body develops to protect one from diseases Passive Immunity –The temporary defense that an infant acquires from its mothers

21. Immunization Passive Immunization –Immediate, short lived protection Active Immunization –vaccination

22. Test Your Knowledge 1.Mother to baby –Passive immunity 2.Flu vaccine –Active immunization 3.Acute poisoning treatment –Passive immunization 4.Hepatitis A vaccine –Active immunization

23. Test Your Knowledge Cont. 5. Tetanus vaccine –Active immunization 6. Chicken pox –Active immunity 7. Measles, mumps, and rubella vaccine –Active immunization

24. Common Sense Measures Hand washing

25. Common Sense Measures Good Nutrition Regular exercise Bathe or shower daily Cover mouth when coughing or sneezing Avoid contact with people who are sick Avoid sharing of utensils

26. Come out, Come out Wherever you are?

27. Quick Review