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Published byJoel Miles Modified over 8 years ago
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DISEASE An Introduction to Pathogens and Transmission
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DISEASES A change in the normal way that the body functions that causes harm to the body SYMPTOMS: are the changes in our body that occur when we get a disease Example: The sneezing, coughing and runny nose that you get when you have a cold
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COMMUNICABLE DISEASES A disease that can spread from person to person This kind of disease can be INFECTIOUS or CONTAGIOUS
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COMMUNICABLE DISEASES Caused by a PATHOGEN which is a micro-organism that causes diseases You become INFECTED when a pathogen enters your body
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SPREADING DISEASE Diseases can be spread by contact with a person infected with a disease. Can be spread by DIRECT contact Example: Kissing Can be spread by INDIRECT contact Example: Drinking from the glass of an infected person
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RINGWORM Caused by the Trichophyton Fungus Caused by skin to skin contact with an infected person Can also be caused by contact with something an infected person has touched Causes scaly, itchy or painful patches on the skin
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SPREADING DISEASES Disease can enter the body through an uncovered wound. Pathogens that are airborne can enter the body through cuts and wounds
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STREP THROAT Caused by the Streptococcus bacteria The pathogen enters the body through any breaks in our skin Causes very sore throat, fever and thick yellow mucus in the throat
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SPREADING DISEASE Diseases can be spread by infected people, or animal and insects that don’t have a disease. A pathogen can live in an organism and not cause a disease, but it can be passed on to someone else and cause disease. These organisms that are infected but not sick are called a CARRIER or a VECTOR.
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MALARIA The mosquito is a vector of the deadly disease malaria A bite from an infected mosquito can introduce the pathogen to the circulatory system and ultimately to the liver. The disease causes fever and headache, which in severe cases can progress to coma or death.
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NON-COMMUNICABLE DISEASES Any disease that cannot be spread by person to person People with non-communicable diseases have something in their body that does not work Sometimes people are born with non- communicable diseases You cannot catch a non- communicable disease
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NON-COMMUNICABLE DISEASES MULTIPLE SCLEROSIS: causes numbness, muscle weakness and blurred vision DIABETES: causes excessive thirst, fatigue and high blood sugar SICKLE-CELL ANEMIA: red blood cells are “sickle shaped” causing a host of health problems
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