Biohelminths

a group of parasitic worms that as adults infest the primary (final) host (man or animal) and in the larval stage infest the intermediate host (various animals), unlike geohelminths, which develop without an intermediate host. For example, the adult beef tapeworm infests the human intestine, but its larvae, cysticerci, develop in the muscles of cattle. Man becomes infected by eating half-cooked meat infested with cysticerci. The tapeworms also include the broad tapeworm, liver fluke, trichina, echinococcus, and many other helminths. The term “biohelminth” was proposed by the Soviet helminthologist K. I. Skriabin.