2 What are Communicable Diseases? A disease that is spread from one living thing to another or through the environment.An organism that cause diseases is a pathogen.An infection is a condition that occurs when pathogens enter the body, multiply, and damage body cells.
3 Types VIRUS Pieces of genetic material surrounded by a protein coat By themselves, they are inactive- they need living cells to produceThe virus invades a host cell and then takes control to manufacture more viruses.Eventually the viruses are killed by the immunity system- though sometimes it can be a life long infection.
4 Bacteria Single-celled microorganisms that live anywhere on earth Most are harmless, and many are essential for life- such as in your digestive systemWhen bacteria enter the body, they are usually killed by the immune systemMost bacterial disease can be treated with antibiotics
5 Fungi Protozoans Rickettsias Plantlike organism- like mold or yeast Some cause disease of the skin, mucus membranes and even the lungsProtozoansSingle-celled organisms that are larger and more complex than bacteriaMost are harmless though some can cause people with weaken immune systems.RickettsiasEnter body through an insect- fleas or lice.Can cause Rocky Mountain Fever
6 How they are transmitted Direct ContactPassage through contact with an infected person or animal or with something in the environment.This includes kissing, touching, biting, sexual contact, sneezing or coughing.Indirect ContactWhen someone comes into contact with a contaminated objectCan be through air, water, food, insect
7 Prevention Washing hands adequately and properly Handle and prepare food properlyCook quickly and at the right temperatureEat healthyHealthy sexual choicesManage stress
8 Physical and Chemical Barriers SkinVery few pathogens can enter through the dead skin layersTears and SalivaContain enzymes that destroy or disable pathogensCiliaHairlike projections that line part of the respiratory system to sweep pathogens to the throat to be swallowed or coughed outGastric JuicesDestroys many pathogens that enter the body
9 Your TaskRead PagesYou will be creating an outline of these 2 pages, making sure to draw and understand the chart on pg.630It is crucial you understand how this worksTomorrow is a brochure activity
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