Types of Microorganisms
    Site written by
Steve Dickson

Page Index A to Z

   Flesh Eating
   Stomach Bacteria

Effective Microorganisms

Water Microbes
   Bottled Water Microbes

Harmful Microbes
Microbe Pictures
Living Soil Microbes
List of Microbes
Types of Microorganisms

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MicroorganismsMicroorganisms - Information on the top microbe related searches. Covering bacteria, effective and harmful microbes as well as microbe pictures, details of microorganisms in water and the living soil and more.

This page lists the types of microorganisms including viruses, bacteria, fungi, protozoa and helminths and also defines the two main living groups prokaryotes and eukaryotes with links to other reference sites showing types of microorganisms.

Generalised Bacterial Cell Structure Diagram


Types of microorganisms

Micro-organisms are organisms which share the property of being sub-microscopic. They existed long before man and we have had to adapt to live in an environment where they are far more abundant. Many micro-organisms do not normally cause disease in man, existing in a state of either COMMENSALISM, where there is little or no benefit or harm to man, or in MUTUALISM, where there is some benefit gained by both partners. Types of microorganisms. This non-harmful balance exists when the immune system works well, but these same organisms can cause infection when the latter fails. This changed property is shared by many other micro-organisms which can cause infectious disease in the immunocompetent individual, so-called PATHOGENS. Types of microorganisms.
These pathogens fall into five main groups:


In addition, by convention there are two further classes of small agents which are often included in the study of Microbiology (although not covered in this types of microorganisms website).

Ticks and mites
Mesozoa and leeches

other lists & sub-divisions

Other scientists will list the following as microorganisms :
Bacteria (eubacteria & archaea), algae, fungi, protozoa, viruses, prions, lichens, slime moulds

Living creatures are divided into two key groups: the prokaryotes, where the DNA in their cells is not enclosed in a membrane-bound nucleus and the eukaryotes where the cells do have their DNA enclosed in a nucleus and often contain other membrane-bound organelles as well. Types of microorganisms. The eukaryotes include fungi, protozoa, algae, plants and all multicellular animals. Prokaryotes include bacteria and the mysterious archaebacteria which are prokaryotic in general structure but also share some characteristics with eukaryotes. Viruses are akaryotic because they are non-cellular. Prions are not micro-organisms but they are studied by microbiologists.

The most relevant links we could find, placed here free

EncyclopŠdia Britannica - Definitions of types of microorganisms. You need to activate a free trial to fully see this article. www.britannica.com

Lenntech - ozone disinfection microorganisms. www.lenntech.com

Microbiology online - Different micro-organisms. www.microbiologyonline.org.uk

Site structure created by Neil Villette Site written by Steve Dickson