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

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

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

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

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

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

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

8. Spread of infectious pathogens
Transmission
Spread of infectious pathogens

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

10. Animals
Dogs
Rabies
Mosquitoes
Malaria and dengue fever

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

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

13. What’s wrong with this picture?

14. Nonspecific vs. Specific Resistance
Immune Response
Nonspecific
vs.
Specific Resistance

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

16. Specific Resistance
Lymphocytes
T-cells
B-cells
Antibodies
Macrophages

17. Mission: Search and Destroy

18. Immunity and Immunization
Prevention
Immunity and Immunization

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

20. Immunization Passive Immunization Active Immunization
Immediate, short lived protection
Active Immunization
vaccination

21. Test Your Knowledge Mother to baby Flu vaccine
Passive immunity
Flu vaccine
Active immunization
Acute poisoning treatment
Passive immunization
Hepatitis A vaccine

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

23. Common Sense Measures
Hand washing

24. 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

25. Come out, Come out Wherever you are?

26. Quick Review

27. THE END