Which Cestode belongs to Pseudophyllidea?

Which Cestode belongs to Pseudophyllidea?

Which Cestode belongs to Pseudophyllidea?

The parasitic cestodes discussed in this chapter are flatworms (platyhelminths) of the orders Pseudophyllidea (Diphyllobothrium and Spirometra) and Cyclophyllidea (other species), which divide their life cycle between two animal hosts (Fig. 291-1).

Which parasites are cestodes?

Parasite name and classification Cestodes, or tapeworms, include multiple species of flat worms that can reside in the human gastrointestinal tract. The species that most commonly cause human disease include Taenia saginatum, Taenia solium, Diphyllobothrium latum and Hymenolepis nana.

What is the deadliest Cestode?

Pork tapeworm: Taenia solium Sometimes larvae cross the blood-brain barrier and enter the central nervous system (CNS), where the embryos develop into fluid-filled cysts leading to a condition known as neurocysticercosis which results in seizures and is one of the most dangerous parasitic CNS infections worldwide.

What are the common hosts of cestodes?

Echinococcus eggs from dog or fox fur cause human hydatid disease (humans are the intermediate host; canids are the definitive hosts). Reinfection with adult tapeworms is common; second infections with larvae are rare.

Is Hymenolepis nana a nematode?

Dwarf tapeworm (Hymenolepis nana, also known as Rodentolepis nana, Vampirolepis nana, Hymenolepis fraterna, and Taenia nana) is a cosmopolitan species though most common in temperate zones, and is one of the most common cestodes (a type of intestinal worm or helminth) infecting humans, especially children.

How are cestodes classified?

Cestoda is a class of parasitic worms in the flatworm phylum (Platyhelminthes). Most of the species—and the best-known—are those in the subclass Eucestoda; they are ribbon-like worms as adults, known as tapeworms.

What are intestinal cestodes?

INTRODUCTION. Cestodes are helminths parasites of humans and animals with complex lifecycles, most of which involve a definitive host bearing the adult stage or tapeworm and one or more intermediate hosts bearing the larval form or metacestode. The adult cestodes form are tapeworms that live in the intestinal lumen.

What is a cestodes infection?

Overview. Tapeworm infection is caused by ingesting food or water contaminated with tapeworm eggs or larvae. If you ingest certain tapeworm eggs, they can migrate outside your intestines and form larval cysts in body tissues and organs (invasive infection).

Why are cestodes considered Polyzoic?

The cestodes discussed below are polyzoic – that is they possess multiple proglottids. These proglottids are uniform in structure, but increase in size proximally to distally as the worm grows.

What is the scariest parasite?

Cordyceps: the fungus that turns insects into mushrooms This parasitic fungus actually grows into the brain of insects, progressively devouring the host’s brain until the insect dies. Once this occurs, Cordyceps grows as a fungis out of the head of its dead host.