What are harmful microorganisms?

Microorganisms:

1. Microbes are minute, unicellular organisms that are invisible to the naked eye.
2. Example - bacteria, fungi, protists

Harmful microorganisms:

1. They can cause diseases in plants, animals, and humans and are termed pathogens.
2. They have the potential to contaminate our food.
3. These pathogens usually enter the body through contaminated food, air, and water and then spread to other organs via blood.
4. For example, Salmonella typhi is a pathogenic bacteria that cause human typhoid fever.
5. Rhinoviruses cause the common cold.