What is microbiology?

Microbiology is the study of living organisms of microscopic size, which include bacteria, fungi, algae, protozoa, and the infectious agents at the borderline of life that are called viruses. It is concerned with their form, structure, reproduction, physiology, metabolism, and classification. It includes the study of their distribution in nature, their relationship to each other and to other living organisms, their effects on human beings and on other animals and plants, their abilities to make physical and chemical changes in our environment, and their reactions to physical and chemical agents. Microbiology is an specialized field of a biology which deals with the study of microorganism and their effects on human and environment regarding public healtha and hygiene, quality control food and beverages, biotechnology related different industrial processes, etc.