It is used to describe many different types of life forms, with dramatically different sizes and Microscopic plants are also considered microbes, though they don't. There is also strong evidence that microbes may contribute to many non–infectious chronic diseases such as some forms of cancer and coronary heart disease. Microbes are the tiny microorganisms that inhabit the world with us, around us, and even in us. Learn more about how these microscopic beings.


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But before you panic about the fact that they are presently inhabiting your body, it is important to understand that they typically do much more good than harm.

What Are Microbes? - Definition, Types & Uses - Video & Lesson Transcript |

While some examples such as bacteria and viruses are types of microbes to blame when we get sick, the benefits of microbes to our world are vast. In this lesson, learn more about this unseen group of organisms and gain a better understanding of how they fit into our world.

Types of Microbes As mentioned previously, microbes are found literally everywhere in our world. They live in soil, on plants, and in and on our bodies. They thrive in ponds types of microbes streams, and they inhabit our oceans.

What are Microbes?

Microbes are all around us in the air, not to mention on every types of microbes of our home. They have even adapted to living in boiling thermal vents as well as ice-covered lands. So what exactly are these tiny creatures?


There are five main groups of microbes populating our earth. These include bacteria, viruses, fungi, algae and protozoa.

Microorganism - Wikipedia

You are most likely familiar with some of these organisms. Types of microbes of us have a negative association with the thought of bacteria and viruses. Thus, Pasteur dealt the death blow to the theory of spontaneous generation and supported the germ theory of disease.

InRobert Koch — established that microorganisms can cause disease.

Types of Microbes — The National Academies

He found that the blood of cattle which were infected with anthrax always had large numbers of Bacillus anthracis. Koch found that he could transmit anthrax from one animal to another types of microbes taking a small sample of blood from the infected animal and injecting it into a healthy one, and this caused the healthy animal to become sick.

He also found that he could grow the bacteria in a nutrient broth, types of microbes inject it into a healthy animal, and cause illness. Based on these experiments, he devised criteria for establishing a causal link between a microorganism and a disease and these are now known as Koch's postulates.


It was not until the work of Martinus Beijerinck and Types of microbes Winogradsky late in the 19th century that the true breadth of microbiology was revealed. Winogradsky was the first to develop the concept of chemolithotrophy and to thereby reveal the essential role played by microorganisms in geochemical processes.

Bacteria and archaea are almost always types of microbes, while a number of eukaryotes are also microscopic, including most protistssome fungias well as some micro-animals and plants.

Yeasts live as small, individual cells, types of microbes the size of bacteria and our own cells. Molds and mushrooms are actually the fruiting bodies of fungi that live as long, microscopic fibers. Fungi are important decomposers in most ecosystems.