The authors are very pleased to bring out the Tenth Edition of Foundations in Microbiology. The response to previous editions has been overwhelming and quite encouraging. We are thankful to fellow teachers and students for their constructive suggestions and criticisms. Their inputs have definitely helped us in improving the text. Audience of the Book : This book Useful for Life Science student. Table of Contents: 1. Introduction to an Invisible World 2. History of Microbiology 3. Microscopy 4. Staining 5. The cellular organisation of Microorganisms 6. Microbial Diversity 7. Microbial Associations