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Presented by: Brittney Drayton Form 5 Plain

Presented by: Brittney Drayton Form 5 Plain. Diseases. What is a disease?. A disease is any condition which causes the malfunctioning of cells, tissues or organs and damages the health of an organism. Types of diseases. There are four types of diseases. They are: Pathogenic Deficiency

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Presented by: Brittney Drayton Form 5 Plain

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  1. Presented by: Brittney DraytonForm 5 Plain Diseases

  2. What is a disease? • A disease is any condition which causes the malfunctioning of cells, tissues or organs and damages the health of an organism.

  3. Types of diseases • There are four types of diseases. They are: • Pathogenic • Deficiency • Hereditary • Physiological

  4. Pathogenic • Pathogenic diseases are those caused by parasitic organisms such as viruses, bacteria, fungi and protozoan.

  5. Examples: • In humans: Polio, Athletes foot, Malaria • In plants: Mosaic (tobacco), Bacterial spot (peppers), Bunchy top (pawpaw)

  6. Methods of control • Drugs to relieve symptoms • Drugs to kill pathogens • Isolate and treat infectious individuals.

  7. Deficiency • Deficiency diseases are caused by lack of an essential substance such as a nutrient.

  8. Examples: • In humans: Rickets (lack of vitamin D), Anaemia (lack of iron) • In plants: death of growing tips (lack of calcium), mottled leaves with yellow edges (lack of potassium)

  9. Methods of control • A diet rich in the missing nutrient and dietary • Supplements rich in the missing nutrient • Improving the nutrition within populations.

  10. Hereditary • Hereditary diseases are passed on from one generation to the next.

  11. Examples: • Haemophilia • Sickle cell anaemia

  12. Methods of control • Drugs to relieve symptoms • Genetic counselling to predict the likelihood of offspring developing the disease.

  13. Physiological • Physiological diseases are caused by an organ that is malfunctioning.

  14. Examples: • Hypertension • Diabetes

  15. Methods of control • Drugs to relieve symptoms as they occur. • Control diet, reducing intake of carbohydrates (diabetes), salt and fats (hypertension). • Regular check ups with doctor.

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