1. Infectious Diseases

2. What is an Infectious Disease?
Any disease that is caused by an agent that has invaded the body.
These are caused by:
Person to person contact
Food and water
Animals
Something in the environment

3. Person to Person Contact
Sneezing
Coughing
Sharing Drinks

4. Food and Water Contaminated water Contaminated food
Example: Salmonella
Contaminated water
Drinking from streams and lakes

5. Animals
From animal bites we can get rabies, malaria, Lymes disease, West Nile etc.

6. Environment
Pathogens that are present on most of the objects around you.
Door handles
Phones

7. All infectious diseases are caused by a pathogen.
A pathogen is any agent that causes disease.
Examples:
Bacteria
Viruses
Fungi
Protozoan
Parasites

8. Bacteria A tiny single cell organism that lives everywhere on earth.
Examples:
tuberculosis, tetanus, sinus infection
Treatments:
Antibiotics (which prevent growth and division of bacteria.

9. Viruses
A disease causing particle made of genetic material and a protein coat.
Examples: Chicken pox, flu, measles, colds, AIDS
Treatment: Medication to treat the symptoms and prevent further production in human cells.

10. Bacteria versus Viruses
Bacterial infections: Can be treated with antibiotic
Examples: strep throat, sinus infections
Viruses: Can only treat the symptoms. Some viruses just have to run their course.
Examples: flu, cold, mumps, measles, hepatitis

11. Bacterial Diseases Strep throat Tuberculosis Sinus infection Malaria
Tetanus

12. Viral Diseases Common cold Influenza (flu) Cold sores Warts
Mononucleosis
Chicken pox
AIDS

13. Fungus
Organisms that absorb and use nutrients of living or dead organisms.
Examples: athletes foot, ringworm, yeast infections
Treatment: over the counter meds or prescription

14. Protozoans Single celled, microscopic organisms.
Leading cause of death in some parts of the world.
Example: malaria
Prevention: good hygiene and health

15. Parasite Get energy and nutrients from feeding on other things.
Examples: Head lice, tape worm, lymes disease

16. How does your body fight diseases?
Physical Barriers: skin, mucous membranes
Consider these to be like a defensive line

17. Inflammatory Response: reaction to injury or infection that is characterized by pain, redness, swelling.
This would be the linebackers

18. Immune system: Contain certain types of blood cell and antibodies.
Safety

19. If the pathogen makes it past your immune system and score a touchdown, you are now officially sick!