Teaching Resource

Microorganisms - Good and Bad Bacteria Poster

Free on Plus | 1 page (PDF)|Grades: 4 - 7

A poster about bacteria and how it can be both good and bad for us.

Good and Bad Bacteria.

There are millions of different types of bacteria that are foundalmost everywhere in the world. There is good and bad bacteria.

Did you know?There is an estimated five nonillion bacteria in the world.That’s 5,000,000,000,000,000,000,0,000,000,000,000,000,000,000,000,000,000,000.


Good bacteria can be found in foods suchas yogurt and cheese, in the soil to helpplants grow and living on or inside ourbodies. They fight the bad bacteria for usand mostly live inside our digestive systems.


Bad bacteria can make us very sick and cansometimes spread to other people. It also
attacks animals, trees and plants. Badbacteria is responsible for infections insores and cuts and food poisoning.

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