Microbe is a broad term
It includes microscopic bacteria, archaea, many fungi and protists, and is often used alongside viruses in everyday discussion.
Many microbes are useful or neutral
They recycle nutrients, ferment foods and form ecological partnerships.
Some cause disease
Pathogenic organisms are a small but important part of microbial diversity.
Context matters
The same broad group can contain harmless, helpful and harmful species.
This page explains scientific concepts for general learning. It does not replace laboratory safety procedures, professional engineering guidance, or individualized medical advice.