liver fluke

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liver fluke:

see flukefluke,
parasitic flatworm of the trematoda class, related to the tapeworm. Instead of the cilia, external sense organs, and epidermis of the free-living flatworms, adult flukes have sucking disks with which they cling to their hosts and an external cuticle that resists digestion
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The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Liver Fluke

 

(Fasciola hepatica), a parasitic worm of the class Trematoda. The leaf-shaped body has a length of 2–5 cm. At the anterior end are the oral and ventral suckers. The liver fluke infests the liver, bile ducts, and gallbladder usually of herbivorous mammals, and more rarely of humans. The ova develop in water; the larvae that hatch from these ova and the partheno-genetic generations develop in an intermediate host, which is usually a mollusk, for example, the small freshwater snails of the family Lymnaeidae. The larva—a cercaria—emerges from the mollusk, swims, and settles on aquatic and coastal plants, becoming encysted as it converts to an adolescaria. The larvae that are swallowed by the definitive host penetrate the liver, where they grow and mature, eventually causing the disease fascioliasis.

Liver flukes are controlled by draining swamps, where lym-naeids hatch, by exterminating lymnaeids, by rotating pastures, and by treating cattle with anthelmintic drugs.

REFERENCE

Shul’ts, R. S., and G. I. Dikov. Gel’minty i gel’mintozy sel’skokhoziaist-vennykh zhivotnykh. Alma-Ata, 1964.

I. E. BYKHOVSKAIA

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

liver fluke

[′liv·ər ‚flük]
(invertebrate zoology)
Any trematode, especially Clonorchis sinensis, that lodges in the biliary passages within the liver.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
An update of giant liver fluke (Fascioloides magna) infection in ungulates of Banff National Park 1989-1994.
An economic survey conducted at the University of Florida estimated that losses from liver fluke infection could range from $25 to $50 a head.
Of 17 deaths of marked moose, more than half were attributed to meningeal worm and liver flukes. Survival rates of adults, yearlings, and calves were all similar to those found in other non-hunted, lightly predated populations.
Public health and agricultural/fishery agencies should consider intestinal and liver flukes as an FZT complex because they share most biologic features and are risk factors for human infection.
We report herein on a familial outbreak of liver fluke infection due to eating raw fish personally imported from Siberia.
Whether or not an infection progresses to CCA is determined by the duration of the infection, intensity of the infection, genetics of the host, genetics of the liver flukes themselves, other viral infections, other diseases, diet, and other environmental exposures (Figure 1) [20, 25, 26].
Caption: FIGURE 3: RFLP pattern of PCR products of liver flukes collected from bovine (a) and buffalo (b) in Nghe An province, Vietnam, after digestion with RsaI enzyme.
Of the 50 blood samples submitted, more than 20 percent came back positive or bordering positive for liver fluke antibodies, said Sung-Tae Hong, the tropical medicine specialist who carried out the tests at Seoul National University in South Korea.
Similarly, an association between liver fluke infection and intrahepatic stone is well recognized.
Amongst those, coccidia, Haemonchus, liver flukes, Paramphistomes, Trichuris, Taenia [5], Anaplasma, Babesia, Thelleria and Trypanosoma are of much importance especially in buffalo, cow, goat and sheep.
Giant liver flukes and snails in Banff National Park.
Domestic herbivorous animals can be contaminated by liver flukes via the ingestion of grass and vegetables containing metacercariae.