What is meant by liver fluke?

What is meant by liver fluke?

Liver flukes are parasites that can infect humans and cause liver and bile duct disease. There are two families of liver flukes that cause disease in humans: Opisthorchiidae (which includes species of Clonorchis and Opisthorchis) and Fasciolidae (which includes species of Fasciola).

What are metacercariae cysts?

Metacercariae of the echinostome family is encysted in snails, fishs, and amphibians. The cyst is oval or round; the metacercariae can be folded or not, and they possess collar spines and corpuscles in their excretory tubes, which is characteristic of echinosomes’ cercariae and metacercariae (Fig. 4.6).

What is the other name of liver fluke?

The main species is Fasciola hepatica, which is also known as “the common liver fluke” and “the sheep liver fluke.” A related species, Fasciola gigantica, also can infect people.

Where is metacercariae found?

The encysted metacercariae are found in the fish muscle; the non-encysted (naked) metacercariae are found in the body cavity, crawling among the internal organs of the fish. The metacercarial body is yellowish, and this type is known as the yellow grub (Fig.

What fluke means?

a stroke of luck
1 : an accidentally successful stroke at billiards or pool. 2 : a stroke of luck the discovery was a fluke Her second championship shows that the first one was no mere fluke.

What causes liver fluke?

A liver fluke is a parasitic worm. Infections in humans usually occur after eating contaminated raw or undercooked freshwater fish or watercress. After liver flukes have been ingested, they travel from your intestines to your bile ducts in your liver where they then live and grow.

What is metacercariae larva?

Definition of metacercaria : a tailless encysted late larva of a digenetic trematode that is usually the form which is infective for the definitive host.

Which of the following parasitic metacercariae are found in fish?

Heterophyid metacercariae are usually found encysted in many families of fish, such as: Cobitidae, Cottidae, Cyprinidae, Gobiidae, Mugilidae, Ophicephalidae, Percidae, Plecoglossidae, or Siluridae.

Can humans get liver flukes?

People can get infected with liver flukes after swallowing the parasite, most often by eating raw vegetables or drinking contaminated water. You may also show symptoms like: Enlarged liver.

Why liver fluke is a Digenetic parasite?

– Liver flukes spend their life cycle utilising two hosts. They live as an internal parasite in the vertebrates during their sexual reproduction phase while have asexual reproduction phase when they are prsesnt in mollusc. Hence they are digenetic organisms.

How is liver fluke transmitted?

People can get infected with liver flukes after swallowing the parasite, most often by eating raw vegetables or drinking contaminated water.

What do flukes do to humans?

Outlook for liver fluke infections A liver fluke infection in itself can never be fatal. However, in rare cases it’s possible for the infection to lead to further complications such as infections of the biliary system, the formation of stones, and bile duct cancer.