Schistosoma japonicum


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Schistosoma

 [shis″-, skis″to-so´mah]
a genus of trematodes, including several species parasitic in the blood of humans and domestic animals. The organisms are called schistosomes or blood flukes. Larvae (cercariae) enter the body of the host by way of the digestive tract, or through the skin from contact with contaminated water, and migrate in the blood to small blood vessels of organs of the intestinal or urinary tract; they attach themselves to the blood vessel walls and mature and reproduce. The intermediate hosts are snails of various species.
The life cycle of Schistosoma. From Mahon and Manuselis, 2000.
Schistosoma haemato´bium a species endemic in North, Central, and West Africa and the Middle East; the organisms are found in the venules of the urinary bladder wall, and eggs may be isolated from the urine.
Schistosoma japo´nicum a species geographically confined to China, Japan, and nearby countries; found chiefly in the venules of the intestine.
Schistosoma manso´ni a species widely distributed in Africa and parts of South America; the organisms are found in the host's mesenteric veins, and eggs may be found in the feces.

Schis·to·so·ma ja·po·ni·cum

the Oriental or Japanese blood fluke, a species having eggs with small lateral spines, usually only a small knob; causes schistosomiasis japonica, with extensive pathology from encapsulation of the eggs, particularly in the liver, and is the most pathogenic of the three common schistosome species afflicting humans, possibly owing to greater egg production per female worm; it is also the most intractable to treatment and the most difficult to control, as the intermediate hosts are amphibious snails (species of Oncomelania, family Hydrobiidae) that can leave the water to avoid molluscicides, and also because many other animals, such as pigs, oxen, cattle, and dogs, serve as reservoir hosts.

Schis·to·so·ma ja·po·ni·cum

(skis'tō-sō'mă ja-pon'ik-ŭm)
The Asian or Japanese blood fluke, a species that causes schistosomiasis japonica, with extensive pathology from encapsulation of the eggs, particularly in the liver. The intermediate hosts are amphibious snails; other animals, such as pigs, oxen, cattle, and dogs, serve as reservoir hosts.

Schistosoma japonicum

A species common in many parts of Asia. Adults live principally in branches of the superior mesenteric vein. Eggs work their way through the intestinal wall of the host into the lumen and are discharged with feces. Oriental schistosomiasis is caused by this species.
See also: Schistosoma
References in periodicals archive ?
Natural antibodies in microtus fortis react with antigens derived from four stages in the life cycle of Schistosoma japonicum.
Immunological characteristics of natural resistance in Microtus fortis to infection with Schistosoma japonicum.
ISSR an effective molecular approach for studying genetic variability among Schistosoma japonicum isolates from different provinces in mainland China.
Purification of 31 / 32kDa proteins of adult Schistosoma japonicum as antigens (Sj 31/32) for ELISA and IHA, Chinese J Parasitol Parasit Dis 1995;13:25-30.
3] Nonstandard abbreviations: LAT, latex agglutination tests; LPEIA, latex piezoelectric immunoassay; QCM, quartz crystal microbalance; S'OZ, silica; SjAg, Schistosoma japonicum (Sj) antigens; SjAb, Sj antibodies; IRS, infected rabbit serum; TEM, transmission electron microscope; PEG, poly(ethylene glycol); GLU, glutaraldehyde; NRS, normal rabbit serum; BSA, bovine serum albumin; PBS, phosphate-buffered saline.
Carter, The Three-Dimensional Structure of Glutathione S-Transferase of Schistosoma japonicum Fused with a Conserved Neutralizing Epitope on gp4l of Human Immunodeficiency Virus Type I, Protein Sci.
Oncomelania hupensis (Gastropoda: Pomatiopsidae) is a unique intermediate host of the schistosomal parasite, Schistosoma japonicum, in eastern and southeastern Asian countries, particularly in China, where it still remains an important public health problem (Zhou et al.
Development of larval Schistosoma japonicum block in Oncomelaniahupensis by pre-infection with larval Exorchris sp.
Schistosomiasis, which is caused by Schistosoma japonicum, is one of the most serious parasitic diseases in the People's Republic of China despite a documented history >2,100 years.
A case of dysentery in Hunan province, caused by the trematoda, Schistosoma japonicum.
In the past few years the Schistosoma japonicum has been re-found in some lakes and rivers in the east and south China area.
Survey of Schistosoma japonicum infection in the area "Returning Reclaimed Farmland to Lakes," Qingshanghu, Hunan Province.