Page 53 - Active Science 5 Ebook and Activity

3. Cold and flu spread mainly through ____________.

a. water b. gas c. air
4. Tuberculosis (TB) commonly affects the ____________.
a. lungs b. pancreas c. nose

F actors which Spread Communicable Diseases
1. The communicalbe diseases like cholera, typhoid,

diarrhoea, jaundice and polio are either water-borne
or food-borne. The flies and other insects carry germs
from the filth that they sit on.
These are transferred to the exposed food. The dirty
hands of the vendors also contaminate the food.

2. Diseases like chicken pox, measles, ringworm,
whooping cough, etc., are also communicable as they
spread through direct contact.

Their germs are transferred by direct contact, by sharing
towels, handkerchiefs, etc.

Germs (microorganisms) that spread communicable diseases

Microorganisms Diseases

Protozoa malaria, dysentery
dengue, polio, measles, chicken pox,
Virus
aids, viral fever, common cold

Fungi food poisoning, ringworm
typhoid, pneumonia, cholera, tetanus,
Bacteria
tuberculosis

Prevention of Communicable Diseases
1. Keep the surroundings clean.

2. Keep the house well ventilated and well lit.

3. Do not let water stagnate in or around the house.
4. Throw garbage in dustbins. Use only covered bins.

5. Bathe regularly, wear clean clothes and wash hands before and after meals.

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