understanding infectious diseases

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powerpoint presentation section 21.1 understanding infectious diseases objectives identify the causes of infectious diseases. describe four ways in which infectious diseases are spread. section 21.1 understanding infectious diseases section 21.1 understanding infectious diseases myth there isn’t much a person can do to avoid spreading or catching a cold or the flu. fact about 80% of infectious diseases are spread by hand contact. washing your hands with soap and water is a simple and effective way to prevent the spread of colds and the flu. do you think most teens wash their hands as much as they should? what do you think are some ways to encourage more frequent hand washing? section 21.1 understanding infectious diseases also known as communicable diseases, infectious diseases (in fek shus) are caused by organisms or viruses that enter and multiply within the human body. causes of infectious diseases microorganisms (my kroh awr guh niz ums) …

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x than bacteria are known as protozoans (proh tuh zoh unz). protozoans protozoans have the ability to move through fluids in search of food. section 21.1 understanding infectious diseases some infectious diseases are caused by animals such as mites, lice, and certain worms. other pathogens section 21.1 understanding infectious diseases click above to go online. for: more on infectious diseases section 21.1 understanding infectious diseases pathogens can spread through contact with how pathogens are spread an infected person an infected animal contaminated objects contaminated food contaminated soil contaminated water the pathogens can then enter the body through breaks in the skin or through the moist linings of the eyes, ears, nose, mouth, or other openings. section 21.1 understanding infectious diseases many infectious diseases are spread through some form of contact with a person who has the disease. infected people the contact may be direct physical contact. infectious diseases can also …

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acteria simple, single-celled microorganisms. toxin a poison given off by some bacteria that can injure cells. virus the smallest type of pathogen. section 21.1 understanding infectious diseases vocabulary fungi organisms such as yeasts, molds, and mushrooms that grow best in warm, dark, moist areas. protozoan a large and complex single-celled organism. section 21.1 understanding infectious diseases quicktake quiz click to start quiz. section 21.1 understanding infectious diseases end of section 21.1 click on this slide to end this presentation.

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powerpoint presentation section 21.1 understanding infectious diseases objectives identify the causes of infectious diseases. describe four ways in which infectious diseases are spread. section 21.1 understanding infectious diseases section 21.1 understanding infectious diseases myth there isn’t much a person can do to avoid spreading or catching a cold or the flu. fact about 80% of infectious diseases are spread by hand contact. washing your hands with soap and water is a simple and effective way to prevent the spread of colds and the flu. do you think most teens wash their hands as much as they should? what do you think are some ways to encourage more frequent hand washing? section 21.1 understanding infectious diseases also known as communicable diseases, …

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