Synopsis This textbook is being prepared for the students of zoology, agriculture and veterinary science to provide an account of parasites and parasitic diseases of man and his domestic animals existing in tropical and temperate areas. The basic biology and life cycles of parasites of medical and economic importance to man, and in particular those parasites which are typically found in India. Are given detailed treatment. The chapters themselves are comprehensive yet free of unnecessary details. Arrangement f chapters and topics is as such that it is easily followed by the students. He text matter s clear and simple, which is explained through various diagrams. It is hoped that the publication is useful not only to the students but also to the academic professionals.