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2. .

3. .

5. •Bacteria
•Algae
•Fungi
•Protozoa
•Viruses

6. Shape Rod shape/Bacilli
Spherical/Cocci
Spiral/Spirilla

10. Inside host
Use host machinery
For multiplication
In number
It is outside the host
Inactive
No activity

11. Burst the host cell
Infact other cell
Person fall sick

12. Harmful And Useful
Of Microorganism

13. Usage Of Microorganism

14. • Making curd and Bread
• Medicinal use of
Microorganism
• Increasing Soil Fertility
• Cleaning the
Environment
• Vaccine
• commercial production
of alcohol and wine

15. Yeast is an example of microorganism. It is a
fungus. It is used to make bread. There are air
spaces in the bread. The air spaces are caused
by carbon dioxide gas given out whenthe
yeast acts on the dough. This shows that
microorganisms breath.

17. Harmless Of Microorganism

19. Harmful microorganisms can cause
disease
Some disease can easily spread from one
person to another. They are called contagious
diseases. Examples are influenza, measles,
mumps and chicken pox.

20. How do microorganisms spread
from one person to another?
• Through food and drink.
• Sneezing or coughing.
• Direct contact.
• Carried by mosquitoes or flies.
• Microorganisms can also spread through the
air.

21. How to prevent disease from
spreading?
• Wash your hands before handling food
especially after using the toilet.

22. Drink water that has been boiled
because boiling kills microorganisms.

23. • Cover your mouth when coughing or sneezing
to prevent microorganisms from spreading
into the air.

24. • Do not share personal items such as
toothbrush, towel and comb.