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Published byAndrew Harrison Modified over 6 years ago
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KEY CONCEPT Germs cause many diseases in humans.
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Germ theory – states that microorganisms cause diseases.
proposed by Louis Pasteur Disease-causing agents are called PATHOGENS.
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There are different types of pathogens.
Bacteria - single-celled organisms. Viruses - genetic material surrounded by a protein coat. Fungi - multicellular or single-celled
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Different PATHOGENS cause common infectious diseases.
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Many methods are used to control pathogens.
Antiseptics kill pathogens OUTSIDE of the body. Antibiotics kill pathogens INSIDE the body.
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Pathogens can enter the body in different ways.
Indirect Contact does not require touching an infected individual. Direct Contact requires touching an infected individual.
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