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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.

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Presentation on theme: "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."— Presentation transcript:

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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 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 1. Strep throat 2. Tuberculosis 3. Sinus infection 4. Malaria 5. Tetanus

12 Viral Diseases 1. Common cold 2. Influenza (flu) 3. Cold sores 4. Warts 5. Mononucleosis 6. Chicken pox 7. 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!


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