disease ch 27.1 7th
TRANSCRIPT
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Explain the difference betweeninfectious disease and noninfectious
disease
Identify 5 ways you might come intocontact with a pathogen
Discuss 4 methods that have helpedreduce the spread of disease
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Non-infectious Disease: cannot spreadfrom one person to another
Ex: cancer; heart disease
Infectious Disease: can be passed fromone living thing to another
Ex: Chicken Pox, Common Cold
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Pathogen: a microorganism, organism,virus, protein that causes disease
There are many ways pathogens canbe passed: Air
Contaminated Objects Person to Person
Animals
Food and Water
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Sneezes
Coughs
1000s of tiny droplets can be passed
through the air
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Drinking glass
Keyboard
Doorknob, combs, towels
Bacteria or viruses can be left behindafter their use
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Kissing
Shaking hands
Touching
Pathogens made be spread throughdirect contact
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Ringworm (fungus)
Ticks (Lyme Disease, Rocky MountainSpotted Fever)
Mosquitoes (Malaria)
Some pathogens are carried by animals
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Untreated drinking water (Cholera)
Bacteria or parasites growing in food(Salmonella; E. coli)
Take special care to refrigerate foods,cook properly, wash all surfaces
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There are a variety of technologies toprevent the spread of pathogens
Ex: boiling water, UV radiation, ,chemical use help to stop the spread ofdisease
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Louis Pasteur (mid 1800s) microorganisms caused wine to spoil
(bacteria)
Pasteur devised a method using heatto kill bacteria: pasteurization
Milk is pasteurized to kill unwantedbacteria
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Edward Jenner (1700s) studied Smallpox Found that people that had been infected
with cowpox seemed to be protectedagainst small pox
People had developed a resistance to the
disease
The ability to resist or recover from aninfectious disease: Immunity
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Jenners work led to the first modernvaccine
Vaccine: a substance that helps yourbody develop immunity to a disease
Vaccines contain pathogens that are killed
or specially treated
Allows your body to develop an immuneresponse
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Used to treat bacterial infections
Antibiotics can only kill or slow thegrowth of living things
Ex: we take antibiotics to treat Strepthroat