Division of Microbiology was established in 2010, although microbiology represents a scientific and teaching problematic of the Department of Biology for more than half a century. In that time, two laboratories became were established in which the smallest and simplest biological entities are researched from the molecular biological and environmental aspect. The modern conception of biology includes the separation of living organisms into three domains, two are completely included (Bacteria, Archaea), while one (Eukarya) is only partially a subject of microbiology. If you add to that virus and subviral entities, and take into concern the significance of mentioned biological subjects as causes of disease, dominant environmental and evolutionary factors, pioneering, but also nowadays indispensable models in molecular biology and “tools” in biotechnology and gene therapy, it is easy to see that microbiology is a special and significant branch of biology.