The study of parasites, their hosts and the dynamics between them is under the scope of parasitology. It integrates the techniques of cell biology, molecular biology, bioinformatics, immunology, biochemistry and genetics. Some of the sub-fields of parasitology are medical parasitology, veterinary parasitology, structural parasitology and quantitative parasitology. Study in parasitology also encompasses the study of taxonomy, phylogenetics, conservation biology and ecology of parasites. This book discusses the fundamentals as well as modern approaches of parasitology. From theories to research to practical applications, case studies related to all contemporary topics of relevance to this field have been included herein. This book, with its detailed analysis and data, will prove immensely beneficial to professionals and students involved in this area at various levels.