Microbiology is the study of microorganisms (also known as microbes), which are unicellular or cell-cluster organisms and infectious agents too small to be seen with the naked eye. This includes eukaryotes, such as fungi and protists, and prokaryotes, such as bacteria. A fundamental understanding of how a cell works has come through the study of microorganisms. But microbiology also is an applied science, helping agriculture, health and medicine and maintenance of the environment, as well as the veterinary industry. Veterinary Microbiology is concerned with the study of the role of microbes in veterinary medicine that deals with the prevention, diagnosis and treatment of disease, disorder and injury in both domesticated and wild animals, with a wide range of conditions which can a ect di erent species.