What are digenetic trematodes?
Digenic trematodes are unsegmented, leaf-shaped worms that are flattened dorsoventrally. They bear 2 suckers, one surrounding the mouth (oral sucker) and another on the ventral surface of the body (ventral sucker). These serve as the organs of attachment. The sexes of the parasites are not separate (monoecious).
What class are Digenetic flukes?
An example of a typical fluke is Fasciola hepatica (Figure 7-1). Within this class are two subclasses, the subclass Monogenea (the monogenetic trematodes) and the class Digenea (the digenetic trematodes).
What is an example of class Trematoda?
What are trematodes bring out the classification of trematodes with examples?
Also known as flukes, trematodes are a group of parasitic flatworms (leaf-shaped). Although they are mostly associated with such aquatic fauna as fish and mollusks, they also affect various vertebrates as part of their indirect life cycle. Some examples of trematodes include: S.
What is Digenetic?
Definition of digenetic : of or relating to a subclass (Digenea) of trematode worms in which sexual reproduction as an internal parasite of a vertebrate alternates with asexual reproduction in a mollusk.
What are Digenetic helminth?
Introduction. Digenetic trematodes constitute a major helminth group that parasitize humans and animals, and are a major cause of morbidity and mortality. The diseases caused by trematodes have been neglected for years, especially as compared with other parasitic diseases.
What is Digenetic parasite?
Digenetic parasites are those that need more than one host (usually two) to complete their life cycles.
Why is Schistosoma classified as trematode?
There are five species of schistosomes, which are named from the Greek schistos, meaning “split” or “divided,” and soma, meaning “body.” Their classification is based on their flat body structure (thus they are classified in the Phylum Platyhelminthes, meaning broad worm), and they are considered Trematodes (from the …
What’s the difference between Trematoda and Monogenea?
Trematoda, or flukes, are obligate parasitic flatworms that cannot survive without a host. Most flatworms in the class Trematoda have a complex life cycle that involves two or more hosts. Monogenea are ecto-parasites that have only one host per lifetime.
What is the infective stage of Metagonimus Yokogawai?
The life cycle of Metagonimus yokogawai. Figure 3. An infective stage larva (metacercaria) of Metagonimus yokogawai isolated from the muscle of a sweetfish, Plecoglossus altivelis. The cyst size is 0.15 mm in diameter.