From the Greek helmintos - worm. Helminthiasis is a disease caused by helminths.
There are many species of these parasites, which are subdivided into tapeworms, dioeces and roundworms. They often live in the gastrointestinal tract of their hosts, but can also penetrate other organs where they cause physiological damage. Diseases caused by helminths. Fish helminth infections are caused by animals that belong to 6 classes: Trematoda, Monogenoidea, Gyroootylida, Cestoda, Acanthocephala, Nematoda.