Helminth is a general term for a parasitic worm. The helminths include the Platyhelminthes or flatworms (flukes and tapeworms) and the Nematoda or roundworms. Fascioliasis is a parasitic infection typically caused by Fasciola hepatica, which is also known as “the common liver fluke” or “the sheep liver fluke.” A related parasite, Fasciola gigantica, also can infect people. Fascioliasis is found in all continents except Antarctica, in over 70 countries, especially where there are sheep or cattle. Parasitic worms, also known as helminths, are large macroparasites; adults can generally be seen with the naked eye. Many are intestinal worms that are soil-transmitted and infect the gastrointestinal tract.There are three main classes of parasites that can cause disease in humans: protozoa, helminths, and ectoparasites. Entamoeba histolytica is a protozoan.Parasite life-cycles involving only one host are called "direct"; those with a definitive host (where the parasite reproduces sexually) and at least one intermediate host are called "indirect". An endoparasite lives inside the host's body; an ectoparasite lives outside, on the host's surface.
What are parasitic worms called?
Parasitic worms, also known as helminths, are large macroparasites; adults can generally be seen with the naked eye. Many are intestinal worms that are soil-transmitted and infect the gastrointestinal tract.
What is the medical term for worms?
Worms may also be called helminths, particularly in medical terminology when referring to parasitic worms, especially the Nematoda (roundworms) and Cestoda (tapeworms) which reside in the intestines of their host.
What is parasitic worms in biology?
Parasitic worm: A worm classified as a parasite. (A parasite is a disease-causing organism that lives on or in a human or another animal and derives its nourishment from its host.)29 мар. 2021 г.
What is the scientific name for intestinal worms?
There are four species of intestinal helminthic parasites, also known as geohelminths and soil-transmitted helminths: Ascaris lumbricoides (roundworm), Trichiuris trichiuria (whipworm), Ancylostoma duodenale, and Necator americanicus (hookworms).
What is a parasitic worm?
Parasitic worm: A worm classified as a parasite. (A parasite is a disease-causing organism that lives on or in a human or another animal and derives its nourishment from its host.)
What is the scientific name for a worm?
Helminth is a general term meaning worm. The helminths are invertebrates characterized by elongated, flat or round bodies. In medically oriented schemes the flatworms or platyhelminths (platy from the Greek root meaning “flat”) include flukes and tapeworms.
What are the three types of parasites?
There are three main types of parasites. Protozoa: Examples include the single-celled organism known as Plasmodium. A protozoa can only multiply, or divide, within the host. Helminths: These are worm parasites. Schistosomiasis is caused by a helminth.
What is it called when a parasite lives outside the body?
Parasites such as lice and fleas that live outside a host are called ectoparasites (“ecto” is also Greek and means “outside”). Parasites living inside a seal pup’s poop are so delicious that gulls will bite the babies in the butt to get at them.
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