infectious diseases 1. organisms that cause diseases are called pathogens 2. infectious disease a....
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Infectious Diseases 1. Organisms that cause diseases are called pathogens2. Infectious disease a. a disease that is caused by the presence of a living thing within the body b. pathogens have gotten inside your body and caused harm.3. Kinds of pathogens
a. Bacteria- food poisoning, strep throat and tetanus. Some pathogens damage cells by producing a poison, also called a toxin.b. Virus – cold, fluc. Fungi – athletes foot, ringwormd. Protists – malaria, African sleeping sickness, amebic dysentery (diahrea, nausea)
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4. How pathogens spreada. Contact with infected people
direct – kissing or shaking handsindirect contact – someone sneezing or shaking hands
b. Soil – botulism ( from not washing vegetables well)c. Food – cholera, dysenteryd. Water – cholera, dysentery (public water system tested to make sure levels are safe)
Well water or other water sources are not tested and you have a greater risk of
getting sicke. Contaminated objects – cold, flu, tetanus (germs can live on chairs, desks, pencils, door knobs. f. Infected animals – rabies (sick animals) , lyme disease (tick bites) , rocky mountain spotted fever (ticks), malaria and West Nile disease(spread by mosquitoes)
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5. How to Prevent Pathogen spread a. Active Immunity (our own immune system)
Some immune systems are stronger than others. Immunity – a body’s ability to destroy pathogens before they cause disease
with the antigens our bodies produceVaccination – process by which harmless antigens are deliberately introduced into a persons body to produce active immunity.
b. Passive Immunity – antibiotics – chemicals that kill bacteria or slows the bacteria's growth of
bacteria's that cause us to get sick
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Noninfectious Diseases 1. Diseases that are not caused by pathogens.
a. cannot be transferred from person to personb. not contagious
2. Allergies- when the body system is sensitive to a foreign substance in the body. Examples: mold, dust, some food.
a. Bodies produce histamines 3. Diabetes
a. Pancreas fails to produce enough insulin or the body fails to use it properly.
b. Results in too much glucosec. Type 1- must take insulin shotsd. Type 2- controlled by diet and exercise
4. Cancer- cells multiply uncontrollably over and over killing the healthy cellsa. Tumors may develop b. Causes – genetic or environment (carcinogen)
Examples: nicotine, UV light, vinyl chloride, arsenic asbestosc. Treatment- drugs, radiation, surgeryd. Prevention- avoid carcinogens, eat healthy and regular exercise