What are examples of trematode?
Digenea
LeucochloridiumSchistosomatidaeAspidogastreaAlaria
Flukes/Lower classifications
What are some of the important trematode parasites of humans?
The most important trematodes are Schistosoma species (blood flukes), Clonorchis sinensis (liver fluke), and Paragonimus westermani (lung fluke). Schistosomes have by far the greatest impact in terms of the number of people infected, morbidity, and mortality.
What type of parasite are trematodes?
Trematoda is a class within the phylum Platyhelminthes. It includes two groups of parasitic flatworms, known as flukes. They are internal parasites of molluscs and vertebrates. Most trematodes have a complex life cycle with at least two hosts.
What is the largest trematode?
The largest of the major hermaphroditic trematode species is Fasciola hepatica (approximately 35 mm by 15 mm) and the smallest is P. westermani (10 mm by 5 mm). Adult schistosomes have a somewhat greater length to width ratio, with males measuring approximately 10 mm by 1 mm and females 15 mm by 0.2 mm.
How many species of trematodes are there?
There are over 18,000 species of Trematoda found throughout the world.
Which parasitic worms cause schistosomiasis?
Schistosomiasis is an acute and chronic parasitic disease caused by blood flukes (trematode worms) of the genus Schistosoma.
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 are intestinal trematodes?
Intestinal trematodes are among the most common types of parasitic worms. About 76 species belonging to 14 families have been recorded infecting humans. Infection commonly occurs when humans eat raw or undercooked foods that contain the infective metacercariae.
Which cercaria may cause cercarial dermatitis?
Figure A: Cercaria of Austrobilharzia variglandis, a species which may cause cercarial dermatitis. Note the forked tail and a pair of dark, small eyespots near the anterior end
Which schistosomes cause cercarial dermatitis?
Several genera/species are known to cause cercarial dermatitis; the most commonly implicated genus globally is the waterfowl schistosome Trichobilharzia spp. ( T. ocellata, T. brevis, T. stagnicolae, T. physellae, T. regenti, and others). Other avian schistosomes that cause cercarial dermatitis include Ornithobilharzia spp., Austrobilharzia spp.
* There are over 20,000 species of Trematoda that can be divided into approximately 2,200 general and about 256 families. While different trematode species may possess features that are absent in others, they share a number of morphological features.