Microbiology
The microbiology is the science in charge of the study and analysis of microorganisms, living things small not visible to the human eye, also known as microbes. Microbes are those organisms that are only visible through the microscope: prokaryotic and simple eukaryotic organisms.
They can be made up of a single cell (unicellular), or of small cell aggregates formed by cells without cell differentiation.
They can be eukaryotic (such as fungi and protoctists) and prokaryotes (such as bacteria).
However, traditional microbiology has dealt especially with the pathogenic microorganisms of bacteria, viruses, and fungi, leaving the other microorganisms for other branches of biology to study.
In addition to bacteria and fungi, there are acellular forms, without a life of their own, capable of altering the functioning of the organisms they infect. They are viruses, viroids and prions.
In this topic we will not deal with bacteria because we already studied them when we saw the prokaryote.