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Infectious Disease Definition: Diseases transmitted(spread) by pathogens(germs) Infectious Disease The diseases are contagious -capable of being transmitted by bodily contact with an infected person or object The diseases are communicable-capable of being transmitted by infection Pathogens Three types Virus: invades body cells, then cells increase and break open with virus moving on to other cells..smallest and most numerous Bacteria: produces infection causing poisonous waste Fungus: attach to body cells causing damage and robbing them of their nutrients Types of infections http://images.google.com/imgres?imgurl=http://health.uta h.gov/epi/morbidity_report/2007/jun/chart2_jun07.jpg&i mgrefurl=http://health.utah.gov/epi/morbidity_report/2007 /jun/Jun07.html&h=718&w=1014&sz=94&hl=en&start=3 4&um=1&tbnid=mosVsSFt5eFKtM:&tbnh=106&tbnw=1 50&prev=/images%3Fq%3Dcommunicable%2Bdisease% 26start%3D20%26ndsp%3D20%26um%3D1%26hl%3De n%26rls%3DRNWE,RNWE:200604,RNWE:en%26sa%3DN How Pathogens are Spread Infectious diseases spread through two types of contact Direct contact Person to person – shaking hands, touching, etc….. Animal to person – bites or stings Mother to unborn child Indirect contact – inanimate objects…doorknobs, faucet handle, table tops Water Air Food-temperature(undercooked or unwashed foods) Methods to prevent spread of germs Wash your hands frequently Get vaccinated Use antibiotics sensibly Stay home if signs and symptoms of infection Be smart when preparing food Keep Hot zones in home clean – areas with concentration of bacteria – bathrooms and kitchen Don’t share personal items- toothbrush,hair brush, razor Flu Virus http://images.google.com/imgres?imgurl=http://www.3dsc ience.com/img/Products/3D_Models/Biology/Viral/Influe nza/supporting_images/3d_model_biology_influenza_web 2.jpg&imgrefurl=http://www.3dscience.com/Resources/In fluenza_Virus.php&h=300&w=300&sz=53&hl=en&start =1&um=1&tbnid=_KoNzUhnYanZqM:&tbnh=116&tbnw =116&prev=/images%3Fq%3Dflu%2Bvirus%26um%3D1 %26hl%3Den%26rls%3DRNWE,RNWE:200604,RNWE:en Body Defenses Skin Blood Antibodies – white blood cells Anti-biotics Antibiotics are the first line of defense against many infections. But overusing or misusing antibiotics can cause more harm than good. Antibiotics are only effective against bacterial infections, certain fungal infections and some kinds of parasites. Most infections result from either bacteria or viruses. Antibiotics can't help you if a virus is responsible for your illness.