groups of microscopic organisms, some of which cannot be detected without the aid of a light or electron microscope, including the viruses, the prokaryotes (bacteria and archaea), and eukaryotic life forms, such as protozoa, filamentous fungi, yeasts and micro-algae. [CUB] - a micro-organism is a protozoean, fungus, bacterium, virus or other microscopic self-replicating biotic entity. [FAO bis
Microorganisms are very small life forms that can be seen only with a microscope. They include bacteria, viruses, moulds and yeasts. Certain microorganisms can cause food spoilage and some of these (pathogens) can also cause foodborne illness.
Bacteria, yeasts, simple fungi, algae, protozoans, and a number of other organisms that are microscopic in size. Most are beneficial but some produce disease. Others are involved in composting and sewage treatment. Milligrams/liter (mg/l): A measure of concentration used in the measurement of fluids. Mg/l is the most common way to present a concentration in water and is roughly equivalent to parts per million.