Microbiology is the study of microorganisms. Microbiology typically includes the study of the immune system. Generally, immune systems interact with pathogenic microbes; Microbiology is a broad term which includes virology, mycology, parasitology, bacteriology and other branches. A microbiologist is a specialist in microbiology and these other topics.Microbiology is researched actively, and the field is advancing continually. The field of microbiology can be generally divided into several subdisciplines like Microbial physiology,Microbial genetics,Cellular Microbiology, Medical microbiology, Veterinary Microbiology, Evolutionary microbiology,Industrial microbiology, Aeromicrobiology, Food microbiology, Pharmaceutical microbiology, Agricultural microbiology, Soil Microbiology, Water microbiology ,Generation microbiology, Nano microbiology. Microorganisms can be used for the industrial production of amino acids, antibiotic, enzymes, vitamins etc. A variety of biopolymers, such as polysaccharides, polyesters, and polyamides, are produced by microorganisms. Microorganisms are used for the biosynthesis of xanthan, alginate, cellulose, cyanophycin, poly(gamma-glutamic acid), levan, hyaluronic acid, organic acids, oligosaccharides and polysaccharide, and polyhydroxy alkanoates. Microorganisms are beneficial for microbial biodegradation or bioremediation of domestic, agricultural and industrial wastes and subsurface pollution in soils, sediments and marine environments. There are also various claims concerning the contributions to human and animal health by consuming probiotics (bacteria potentially beneficial to the digestive system) and/or prebiotics (substances consumed to promote the growth of probiotic microorganisms).Recent research has suggested that microorganisms could be useful in the treatment of cancer.