Importance of bacteria in the field of medicine cannot be under evaluated. They are single-celled microorganisms and don't have a definite nuclear membrane so that they isolate by double splitting, binary fission. Bacteriology is the science which deals with bacteria’s and their connection to medicine. Current research in Bacteriology gives a high importance to apply the germ hypothesis to identifying the harmful activity of bacteria in the waste of food sustenances and wines. bacteriology has numerous fruitful advances like powerful antibodies, for instance, diphtheria toxoid.There have additionally been a few immunizations that were not as viable and have reactions, for instance, typhoid, and torment immunizations. Bacteriology has additionally given disclosure of anti-microbial.