The main aim of this book is to summarize and synthesize our knowledge of the main features of the development and transmission of parasitic nematodes of vertebrates, and to place this information within the context of the modern classification of the nematodes. The volume is unique in its comprehensive coverage, and includes nematode parasites of humans, domestic animals and wildlife, including fish. After an introductory chapter, the author systematically describes the biological characteristics of the 27 superfamilies of nematodes, followed by families, subfamilies and sometimes genera. Altogether, some 561 particular species are reviewed (most individually) and approximately 2700 references cited. The book provides a unified zoological overview of development, life cycles and transmission, rather than emphasizing diseases caused by the parasites. It is a definitive reference work for parasitologists, as well as for interest physicians, veterinarians, zoologist and wildlife and fisheries biologists.