A book that is a rich source of information in the field of three sections of zooparasitology: protozoology, helminthology and arachnoentology. The book contains an extensive panorama of the world of human and animal parasites, objects of important medical importance are clearly presented. More than 430 color photographs, micrographs, electronograms and diagrams are presented to your attention. The illustrations are accompanied by a short and as concise as possible text that allows you to recognize or reproduce in memory the classification, geographical distribution, morphological characteristics and cycles of the most common parasites - protozoa, helminths and arthropods.