The third edition of Introduction to Medical Microbiology for GNM Students has been written with the aim of providing concise, relevant and updated information on microbiology to nursing students so that they can fulfil their role in the Indian healthcare system. This edition has undergone a complete transformation to address the requirements of the current syllabus. The book is also intended to help in identifying opportunities for practising infection control measures in hospital and community settings. Each chapter has been updated and revised extensively.