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Jamie Gwidt

on 4 April 2013

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Transcript of Disease

Infectious Diseases How Do Pathogens Cause Disease? What Pathogens Cause Infectious Disease & How Are They Spread? How Pathogens Are Spread The Kissing Disease Ancient Times 1. Infected People
2. Soil, Water, Food
3. Contaminated Objects
4. Infected Animals Have you ever heard of mononuleosis? Also known as mono, or the kissing diease, mononuleosis is most common among older teenages and people in their twenties. It got its nickname because the disease can be spread through kissing. But, be careful. Because mono is passed through salivia, it can also be spread by sharing cups, forks, straws, and other utensils. Some common symptoms of mono are fever, sore throat, swollen glands, and fatigue. Misconception: You cannot catch the flu if you've gotten the flu shot. Textbook p. 274 Have you ever had a flu shot? Did the flu shot prevent you from having the flu that year? People thought diseased was caused by
Evil Spirits
Swamp Air
Bodily fluids Louis Pasteur
1860 France
Investigating food spoiling
Discovers microorganisms
organism=living thing
small living things Pasteruization
kills germs in milk & cream
keeps milk from spoiling Who was J.Lister?
British surgeon
Suggested that diseases are spread by microorganisms after surgery Cleaned instruments
Washsed hands His Experiment:
45% of people used to die from infection
Now, only 15% die after washing/cleaning Who was Robert Koch?
German doctor
pathogens-organims that cause disease
infectious disease-speard from living thing to living thing 5 Major Types
Viruses-nonliving particles smaller than bacteria
Bacteria-made of 1 cell, can produce poisions, called toxins
Protists-made of 1 cell, larger than bacteria
Fungi-molds & yeasts
Parasites-an organism that lives on a host & causes harm Is it infecctious?
How can it be spread? What Is the Body's First Line of Defense? Skin
Breathing passages
Mouth & Stomach What are the 2nd & 3rd line of defense? 3rd defense
Different reaction depending on the pathogen
Occurs in the blood & tissue Both defend against pathogens Inflamatory
Response Immune
Response 2nd defense
It's the same for every pathogen
Fluid & white blood cells fight
Swelling & fever phagocyte-white blood cells that engulf the pathogens & destroys them lymphocytes-know what kind of pathogen it is & send out T cells or B cells(antibodies) to fight it
Full transcript