Contents: 1. Introduction.2. Diversity of Microorganisms. 3. Nutrition and Growth. 4. Disinfectants and Antiseptics 5. Immunology 6. Bacterial Genetics. 7. Epidemiology of Diseases. 8. Microorganisms and their Environment. 9. Applications of Microbes Pharmacy. 10. Microbiological Assays of Antibiotics. 11. Microbial Spoilage and Preservation of Pharmaceutical Products. 12. Miscellaneous Topics. Pharmeceutical Microbiology is one of the important components in pharmaceutical sciences to prepare and maintain the sterile preparations, control the spoilage of drugs and to study the infectious diseases. To excel in pharmacy career students definitely need comprehensive knowledge and strong foundation in pharmaceutical microbiology subject. Many books are available on general microbiology subject but few books on pharmaceutical microbiology are available for students to choose. As a teacher having 25 years teaching experience in teaching pharmaceutical microbiology and biotechnology related subjects, I have tried to deal basic microbiology, control of microorganisms, immunology, bacterial genetics, microbiological assays, pharmaceutical applications of microorganisms, industrially important microorganisms, some important diseases and miscellaneous topic under this heading. My academic learning in pharmaceutical biotechnology at postgraduate level and Ph.D levels helped me a lot to deal different topics appropriately. Syllabi of all most all Indian Universities is covered thoroughly in this book in a clear and understandable manner, so students need not refer various books for various topics in this subject. Proper care is also taken to prevent the overlap of allied topics which are not appropriate to include in microbiology syllabus.