Microbiology is the study of microorganisms, e.g., bacteria, fungus and viruses. When microbiological concepts, processes and techniques are applied to pharmaceutical operations, the subject is then called ‘pharmaceutical microbiology’. It can be defined as the study of microorganisms that are pertinent to the production of antibiotics, enzymes, vitamins, vaccines, and other pharmaceutical products; it also incorporates the study of microorganisms that cause pharmaceutical contaminations, and degradation, deterioration and spoil of pharmaceutical raw materials and finished products.