1. Communicable (infectious) Disease
Disease that can spread from one living thing to another.
Something contagious
Person to person, animal to person, insect to person
Pathogen- Organism causing the disease/infection.
Infection - Condition that occurs when a pathogen enters the body, multiplies, and damages body cells.

2. There are 4 pathogens... Bacteria Virus
Single-celled microorganism that live almost everywhere on earth.
Some good, some destructive
Bad bacteria produce a toxin that kills healthy cells or interferes with their functions.
Killed with antibiotics
Virus
Genetic material surrounded by a protein coat.
DO NOT reproduce on their own.
Invade a cell and has the cell replicate copies of the virus.
Have to run their course

3. Examples of Viruses & Bacteria
HIV, Hepatitis, HPV, Influenza, West Nile, Measles, Varicella (chicken pox)
Bacteria
Tuberculosis, Gonorrhea, Tetanus, Cholera, Strep Throat, Lyme Disease, Pneumonia, Chlamydia

4. Examples Pathogens….. Fungus Protozoa (parasite) Fungal infections
Ringworm, Athlete’s foot, Conjunctivitis (pink-eye)
Protozoan infections
Malaria, Trichomoniasis, Giardiasis (fecal matter)
Fungus
Plant-like organisms such as molds or yeasts.
Protozoa (parasite)
Single-celled but larger than bacteria. Most harmless but some dangerous to our body.

5. Insect infestations!!!!
Scabies- Is an itchy & highly contagious. Caused by an infestation by the itch mite that creates a relentless rash.
Lice- Tiny insects that live on the body and feed on blood causing intense itching and severe skin irritation.
Three Types: Head lice, pubic lice, body lice

6. Infectious Disease can spread directly or indirectly.
Directly > Contact (kissing, biting)
Indirectly > Surfaces or through objects

7. Vectors- An organism (like a tick, mosquito, flea) that spreads a pathogen to humans through feeding.
Ways of Prevention?
Eat balanced diet
prepare/store food safely
Wash hands often
Manage stress/hygiene
Avoid unnecessary contact
Maintain vaccinations
Keep your immune system strong through exercise, healthy diet, and good sleep….
Certain fruits and vegetables are higher in antioxidants which will provide your immune system with the tools to fight pathogens.

8. Mucous Membranes
A thin, wet layer of skin that is inside some parts of the body and lines body passages that directly connect the interior to exterior.
Sponge-like surface
Eyes
Inside your Nose
Mouth
Penis (Urethra)
Vaginal Opening
Anus

9. “At the Bell” Assignment
List an example of a vector.
List the 4 pathogens.
A preparation of dead or weakened pathogens introduced to the body to trigger an immune response is called….
What is found on the surface and in the toxins of pathogens that triggers an immune response?
Special white blood cells that fight pathogens?
Actual name of chickenpox?