basic microbiology

Microbiology is the study of microorganisms, which are tiny life forms invisible to the naked eye. This diverse group includes bacteria, archaea, algae, fungi, protozoa, and viruses. These microbes are found everywhere—in soil, water, air, and on and within living organisms.1

Microorganisms play crucial roles in ecosystems, such as decomposing organic matter and recycling nutrients. They are also vital in various industrial processes, like producing antibiotics, insulin, wine, beer, and making bread rise. However, some microbes are pathogens that cause diseases in humans, animals, and plants.123

Viruses are unique agents that are not considered living organisms because they cannot reproduce or carry out metabolic processes without a host cell. They consist of genetic material (DNA or RNA) enclosed in a protein coat. Bacteria, on the other hand, are single-celled organisms that can reproduce independently. Protozoa are single-celled, eukaryotic microorganisms, some of which can move using cilia or flagella.4567