1. Aim: How does our body
come under attack?

2. A condition that causes the body to be unable to maintain homeostasis.
What is wrong?
Disease:
A condition that causes the body to be unable to maintain homeostasis.
Show movie Outbreak

3. Foreign organisms that invade the body are called…..
What can cause disease?
Foreign organisms that invade the body are called…..
PATHOGENS
Pathogen: any disease causing organism

4. Four main types of Pathogens:
Bacteria
Viruses
Fungi
Parasites

5. Bacteria: Characteristics
Prokaryotes
Unicellular organisms
Lack most ORGANELLES, no true nucleus.

6. Examples” Antibiotics Strep throat Salmonella Syphilis
What will the doctor
give you to kill
the bacteria?
Antibiotics

7. Virus A VIRUS IS NOT A CELL (IT IS NOT ALIVE)
Made of DNA or RNA + Protein Coat
Very small, smaller then a CELL.
They can only reproduce INSIDE a cell. (PARASITE)
A virus works by injecting its DNA into a cell, turning the cell into a virus producing factory.

8. Can you take antibiotics?
Examples:
HIV
Chicken Pox
Influenza
Can you take antibiotics?
NO!

9. Antibiotics will not work on a virus- they are specific for bacteria.

10. heterotrophic organisms Examples:
Fungus:
heterotrophic organisms
Examples:
Athlete’s foot
Ring worm
What can the doctor
Prescribe?
Fungicides

11. Organisms that feed off of other organisms.
Parasites:
Organisms that feed off of other organisms.
Examples: tapeworm, heartworm, ringworm, ticks
To lose weight, pills that had tapeworms

12. A vector could be living or nonliving.
Host: The organisms that the pathogen is living/feeding off of
Vector: What is transmitting the pathogen.
A vector could be living or nonliving.
Examples: other animals, insects, water, sufaces (desk)

13. How are pathogens transmitted?
Blood
Sex
Food
Air
Animal

14. What does it mean
to be diagnosed?

15. Diagnosing – determine the disease you have.
Diagnosis: based on symptoms, examination and testing.

16. Prevention vs. Treatment
Prevention – ways to avoid getting the disease.
Treatment – ways to help people with a
disease to get better.

17. Besides pathogens, what else can cause disease?
Toxic
Substances
Inherited
Disorder
Organ
Malfunction
Risky Personal
Behavior
Poor Nutrition