The aim of this book is to provide a theoretical and visual aid to the identification of the causative agents (bacteria, viruses, fungi) of human diseases, serological tests, common laboratory media, instruments, laboratory animals, and to study the morphology and life cycle of medically important parasites. Revision summary of parasitology, entomology with questions and answers, glossary, technical terms are added for the special attraction of students interested in quick and ready references. Both theoretical and practical studies are fully covered in lucid manner.