Parasitology refers to the study of the biology of parasites and diseases caused by them. It is also concerned with their evolution, distribution, ecology, biochemistry, molecular biology and physiology along with the clinical aspects like host responses towards parasites. It studies various groups of parasites, including arthropods, protozoa and helminthes. Immunology involves the study of immune systems of the sapient species, animals, plants and humans. It has applications in various medical disciplines such as oncology, virology, parasitology and bacteriology. A parasite is a living organism that obtains its food from a host. The majority of parasites that reside inside and on the body of the host do not cause illness. This book elucidates the concepts and innovative models around prospective developments with respect to parasitology and immunology. It presents researches and studies performed by experts across the globe. This book will prove to be immensely beneficial to students and researchers in these fields.