Taenia asiatica
| Taenia asiatica | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Platyhelminthes |
| Class: | Cestoda |
| Order: | Cyclophyllidea |
| Family: | Taeniidae |
| Genus: | Taenia |
| Species: | T. asiatica
|
| Binomial name | |
| Taenia asiatica | |
Taenia asiatica, commonly known as Asian taenia or Asian tapeworm, is a
T. asiatica causes intestinal taenisis in humans and
Asian taeniasis is documented in nine countries in
Discovery
T. asiatica was first recognized in Taiwan, and subsequently in
In 1992 two Korean parasitologists Keeseon S. Eom, from
Even then scepticism still persisted. Considering the degree of variations between Taiwan strain and typical T. saginata, Taiwanese parasitologists such as P.C. Fan, C.Y Lin, C.C. Chen and W.C Chung from
Description
The body of Taenia asiatica is yellowish-white in colour, about 350 cm long and 1 cm broad, divided into the anterior
The cysticerci of T. asiatica are typically smaller than those of other human taenids. They possess two rows of rudimentary hooks, unlike T. saginata, which has none.[10][11] In addition the protoscolex of cysticercus (metacestode) has a sunken rostellum, while that of T. saginata has only an apical pit.[17]
Life cycle
The
Pigs and wild boars ingest the infective
Pathogenesis
T. asiatica infection in human is usually asymptomatic. There was an isolated report of severe pathogenic lesions in a 60-year-old woman admitted to Mackay Memorial Hospital in Taiwan. Using endoscopy she was diagnosed with multiple erosions and active bleeding from ulcers in the stomach and duodenum caused by a single tapeworm. A year later she returned with intermittent epigastric pain, which she reported having had for several months. Again a tapeworm was seen.[31] The tapeworm species was not identified but was suspected to be T. asiatica, because the woman ate pork liver at a festival, and the common pork tapeworm T. solium is mostly found in pig muscle.[32]
In pigs cysticercus has a tendency to produce cysticercosis. Cysts are formed in vital organs such as liver and lungs. In contrast T. saginata does not cause cysticercosis.[33] As its life cycle and mode of development are very similar to those of Taenia solium, which is the major cause of neurocysticercosis, a possibility that T. asiatica can cause cysticercosis in humans is highly conjectured.[6][16][34]
Epidemiology
The
Diagnosis
The basic
To date the most relevant diagnosis of taeniasis due to T. asiatica is by enzyme-linked immunoelectrotransfer blot (EITB). EITB can effectively identify it from other taenid infections since
Treatment
Niclosamide (2 mg) is very effective against experimental infection in human.
Genome
References
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