* Preface* Introduction* Section-1: Microbial World Classification of Microbes* Importance of Microbes* Importance of Viruses and Protists* Importance of Bacteria* Section-2: Microbial Growth Microbiological Method* Kinetics of Microbial Growth* Section-3: Microbial Metabolism Aerobic Respiration* Anaerobic Respiration* Amino Acid, Lipid and Protein Metabolism* Glycolysis* Carbohydrates* Proteins* Lipid* Function of Vitamins* Metabolic Pathways of Energy Use* Section-4: Application of Microorganism Biodegradation* Mineral Recovery* Environmental Biotechnology* Section-5: Microbial Mechanisms of Pathogenicity and Control Sterilization* Epidemiology* Bacteriology* Section-6: Microorganism Industries and Research Industrial Fermentation* Biotechnology: Application in Industries* Index.