The major groups of parasitic helminths include platyhelminths flatworms acanthocephalins thorny headed worms cestodes tapeworms trematodes flukes and nematodes roundworms the classification and identification of helminths are dependent on numerous factors including body shape body cavity body covering digestive tubing sex and type of attachment organs. The helminths or parasitic worms correspond to three types trematoda or staves are a class of phyllo platyhelminthes flatworms cestoda are another class of the same phyla and nematode another phyllo tubular worms usually the helminths have a macroscopic size measuring from 1 mm to 1 m 003937 in to 328 ft and even more. This book was written expressly for medical laboratory technicians and is intended to be used as a guide to the identification of helminths found in man the book includes chapters on the examinationof stools for helminths and their ova and blood for microfilariae and a simplified identification of trematodes cestodes and nematodes the author confines himself in general to the description . last version parasitology identification of helminths uploaded by robert ludlum the helminths or parasitic worms correspond to three types trematoda or staves are a class of phyllo platyhelminthes flatworms cestoda are another class of the same phyla and nematode another phyllo tubular worms usually the helminths have a