Helps to conduct practices of demonstration classes and solve the difficulty to maintain the practical record book. The contents of this manual reflect the current medical curriculum with the entire emphasis on the clinical impact of infection providing the combined treatment of bacteriology and virology. Emphasizes on evidential mediums and accepted protocols with brief knowledge on the principles and common procedures followed in laboratory experiments. The illustrations, figures and photographs especially the line diagrams illustrated in this volume will help to perform various experiments and write observations and reports. A list of spotless and identifications given in the book will help students to excel in the practical examinations. The WHO recommended test procedures and quality assurance programmers are intimated in this book.