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The surrounding in which we live in, is known as the environment. It is important to keep our surroundings clean so as to prevent illnesses and the spread of diseases.
By the end of the lesson you should be able to explain the concept environmental hygiene.
It is a method of disposing water anywhere in the compound.
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It is a method of disposing water by directing it into gutters or a simple trench dug on the ground. The trench can also be well constructed with materials such as cement, plastic or metal.
In this type of drainage, water is drawn away from the house through pipes and covered drains.
Definition of Drainage
Drainage is the removal of water from houses and buildings such as rain water and waste water. Stagnant water around houses and buildings is a health hazard. It is therefore important to draw it away appropriately.
Types of Drainage
- Free drainage
- Open drainage
By the end of the lesson you should be able to identify different types of drainage.
Malaria is caused by a parasite which is spread by the anopheles mosquito.
Typhoid is caused by a bacteria found in urine or faeces.
Cholera is caused by a bacteria found in contaminated water and food.
Dysentery is caused by protozoa (amoeba) found in human faeces.
Scabies is caused by mites found in places where there is poor personal hygiene.
Bilhazia is caused by parasitic snails found in fresh water.
Ringworms are caused by fungi which affects the skin.
Tuberculosis is caused by bacteria which affects different parts of the body such as the lungs.
Communicable diseases are those that are easily passed on from person to person or from host to person. A host refers to a carrier of disease causing organisms (germs). The common communicable diseases are:
Click on each of the diseases to view the causes.
By the end of the lesson you should be able to:
- State the common communicable diseases.
Identify causes of common communicable diseases.
Mode of transmission of dysentery, typhoid and cholera
One common transmission mode of dysentery, typhoid and cholera is through contaminated water.
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