Fasciolopsiasis
| Fasciolopsiasis | |
| Adult Fasciolopsis buski | |
| ICD-10 | B66.5 |
| ICD-9 | 121.4 |
| MeSH | D014201 |
Fasciolopsiasis results from infection by the trematode Fasciolopsis buski (Lankester, 1857) Odhner, 1902, the largest intestinal fluke of humans (up to 7.5 cm in length).[1]
Geographic distribution
This disease occurs in Asia and the Indian subcontinent, especially in areas where humans raise pigs and consume raw aquatic plants.
Infection cycle
The parasite infects an amphibic snail (Segmentina nitidella, Segmentina hemisphaerula, Hippeutis schmackerie, Gyraulus, Lymnaea, Pila, Planorbis (Indoplanorbis)) after released by infected feces; from this intermediate host metacercaria infest on aquatic plants, which are eaten (raw) by pigs and humans. Also the water is possibly infective when drunk unheated ("Encysted cercariae exist not only on aquatic plants, but also on the surface of the water.".)[2]
Clinical features
Most infections are light and asymptomatic. In heavier infections, symptoms include diarrhea, abdominal pain, fever, ascites, anasarca, and intestinal obstruction.
Laboratory diagnosis
Microscopic identification of eggs, or more rarely of the adult flukes, in the stool or vomitus is the basis of specific diagnosis. The eggs are indistinguishable from those of Fasciola hepatica.
Treatment
Praziquantel is the drug of choice for treatment of fasciolopsiasis.
Incidence/prevalence
- "It has been estimated that there may be 10 million people in East Asia infected with this fluke, yet its radiological identification remains unreported." [3]
Gallery
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![Photomicrograph of fecal sample revealed the presence of a number of parasitic worm eggs, which included the eggs of a trematode, Fasciolopsis buski, an Ascaris sp. nematode, a Trichuris sp. nematode, and an unknown specie of nematodal hookworm (125X mag). From Public Health Image Library (PHIL). [4]](/images/5/59/Fasciolopsis_buski06.jpeg)
Photomicrograph of fecal sample revealed the presence of a number of parasitic worm eggs, which included the eggs of a trematode, Fasciolopsis buski, an Ascaris sp. nematode, a Trichuris sp. nematode, and an unknown specie of nematodal hookworm (125X mag). From Public Health Image Library (PHIL). [4]
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![Fasciolopsis buski egg on the right found in an unstained formalin-preserved stool sample (125X mag). From Public Health Image Library (PHIL). [4]](/images/c/ca/Fasciolopsis_buski05.jpeg)
Fasciolopsis buski egg on the right found in an unstained formalin-preserved stool sample (125X mag). From Public Health Image Library (PHIL). [4]
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![Two Fasciolopsis buski trematode eggs that were found in an unstained formalin-preserved stool sample (125X mag). From Public Health Image Library (PHIL). [4]](/images/9/93/Fasciolopsis_buski04.jpeg)
Two Fasciolopsis buski trematode eggs that were found in an unstained formalin-preserved stool sample (125X mag). From Public Health Image Library (PHIL). [4]
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![Illustration depicts a number of trematode species eggs From Public Health Image Library (PHIL). [4]](/images/d/d3/Fasciolopsis_buski03.jpeg)
Illustration depicts a number of trematode species eggs From Public Health Image Library (PHIL). [4]
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![Image compares the size relationship between three different parasitic eggs. From Public Health Image Library (PHIL). [4]](/images/b/b5/Fasciolopsis_buski02.jpeg)
Image compares the size relationship between three different parasitic eggs. From Public Health Image Library (PHIL). [4]
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![Egg of the giant intestinal fluke, Fasciolopsis buski (500x mag). From Public Health Image Library (PHIL). [4]](/images/d/d3/Fasciolopsis_buski01.jpeg)
Egg of the giant intestinal fluke, Fasciolopsis buski (500x mag). From Public Health Image Library (PHIL). [4]
![Photomicrograph of fecal sample revealed the presence of a number of parasitic worm eggs, which included the eggs of a trematode, Fasciolopsis buski, an Ascaris sp. nematode, a Trichuris sp. nematode, and an unknown specie of nematodal hookworm (125X mag). From Public Health Image Library (PHIL). [4]](/index.php/File:Fasciolopsis_buski06.jpeg)
![Fasciolopsis buski egg on the right found in an unstained formalin-preserved stool sample (125X mag). From Public Health Image Library (PHIL). [4]](/index.php/File:Fasciolopsis_buski05.jpeg)
![Two Fasciolopsis buski trematode eggs that were found in an unstained formalin-preserved stool sample (125X mag). From Public Health Image Library (PHIL). [4]](/index.php/File:Fasciolopsis_buski04.jpeg)
![Illustration depicts a number of trematode species eggs From Public Health Image Library (PHIL). [4]](/index.php/File:Fasciolopsis_buski03.jpeg)
![Image compares the size relationship between three different parasitic eggs. From Public Health Image Library (PHIL). [4]](/index.php/File:Fasciolopsis_buski02.jpeg)
![Egg of the giant intestinal fluke, Fasciolopsis buski (500x mag). From Public Health Image Library (PHIL). [4]](/index.php/File:Fasciolopsis_buski01.jpeg)
References
- ↑ ""Fasciolopsiasis" at Stanford.edu". Retrieved 2007-07-03.
- ↑ Weng YL, Zhuang ZL, Jiang HP, Lin GR, Lin JJ (1989). "Studies on ecology of Fasciolopsis buski and control strategy of fasciolopsiasis". Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi (in Chinese). 7 (2): 108–11. PMID 2805255.
- ↑ "Tropical Medicine Central Resource". Retrieved 2007-07-03.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 "Public Health Image Library (PHIL)".
External links
- Graczyk TK, Gilman RH, Fried B (2001). "Fasciolopsiasis: is it a controllable food-borne disease?". Parasitol. Res. 87 (1): 80–3. PMID 11199855.
- Mas-Coma S, Bargues MD, Valero MA (2005). "Fascioliasis and other plant-borne trematode zoonoses". Int. J. Parasitol. 35 (11–12): 1255–78. doi:10.1016/j.ijpara.2005.07.010. PMID 16150452.
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