Contents: 1. History of microbiology. 2. Metabolism in bacteria: ATP generation. 3. Chemoautotrophy and photoautotrophy. 4. Respiration in bacteria. 5. Bacteriophages. 6. Viroids and prions. 7. Bacterial genetics. 8. Genetic recombination. 9. Genetic engineering. 10. Plasmids and episomes. 11. Genetically modified organisms (GMO). 12. Soil microbiology. 13. Microbial transformation of carbon. 14. Microbial transformation of nitrogen and biological nitrogen fixation. 15. Microbial transformation of phosphorus and sulphur. 16. Microflora of rhizosphere and phyllosphere. 17. Microbes in composting. 18. Microbiology of water. 19. Microbiology of food. 20. Food preservation. 21. Biofertilizers. 22. Microbial insecticides/pesticides. 23. Microbial agents for control of plant diseases. 24. Biodegradation. 25. Biogas production. 26. Biodegradable plastics. 27. Plant microbes interactions.