Write a short paragraph on the harms caused by microorganisms.



Microorganisms are harmful in many ways,they can be harmful for plants,animals as well as humans beings.Such disease causing microorganisms are called Pathogens


Disease causing Microorganism in Humans

When a person suffering from cold sneezes,drops of moisture  are spread in air.These drops contain thousands of virus,

When it reaches healthy person,he gets infected

These can also be spread by

Physical contact(Touching an infected person)

Water(Drinking water from same utensil)

Food(Eating food from same utensil)

Disease causing Microorganism in Animals

Some insects and animals carry harmful microorganisms(pathogens) on them



They stick on garbage and pathogens sick to body


Female Aedes mosquito acts as carrier of dengue virus

Disease causing Microorganism in Plants

Microorganisms cause disease in plants which reduces the yield of the crop,these can be reduced by using some chemicals which kill the microbes.

Diseases in Plants




  1. Class 8
  2. Chapter 2 Class 8 - Microorganisms : Friend and Foe
Class 8
Chapter 2 Class 8 - Microorganisms : Friend and Foe

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo