In the current scenario and development of new course contents as laid down by regulatory bodies for Indian Universities for undergraduate and postgraduate students of botany, microbiology, biotechnology and biosciences, a basic need to cater the complete syllabus into one umbrella has laid down the foundation stone and blueprint of the present book entitled Essentials of Microbiology. This book will extensively assist students, teachers and academicians to further extend their knowledge beyond the course work and related subject matter but onto the practical application to gain insights of what happening new in the present era of applied science.