Fasciola hepatica morphology. Fasciola Hepatica 2022-12-30

Fasciola hepatica morphology Rating: 9,8/10 134 reviews

Fasciola hepatica, also known as the liver fluke, is a parasitic flatworm that infects the liver of mammals, including humans. It is a member of the class Trematoda, which includes all parasitic flatworms. The adult F. hepatica is small, measuring about 0.5 to 1.5 inches in length and 0.2 to 0.4 inches in width. It has a flat, elongated body with a triangular shape and a rounded anterior end. The body is covered in a tough, protective cuticle that is made up of chitin and other structural proteins.

The digestive system of F. hepatica consists of a simple tubular gut with a mouth and an anus. The mouth is located on the ventral surface of the anterior end, and it is surrounded by a muscular pharynx that helps the fluke to attach to the host's intestinal wall. The anus is located on the posterior end of the body, and it is used to excrete waste products.

F. hepatica has a simple nervous system consisting of a small brain and a pair of ganglia, which are clusters of nerve cells. The brain is located at the anterior end of the body, and it controls the fluke's basic functions such as movement and feeding. The ganglia are located near the pharynx and control the pharynx's muscle movements.

F. hepatica reproduces sexually, with both male and female flukes present in the same host. The female fluke lays eggs that are passed out of the host in the feces. The eggs hatch into ciliated larvae called miracidia, which swim through water and seek out suitable snail hosts. Inside the snail, the miracidia develop into sporocysts, which then produce cercariae. The cercariae are released from the snail and swim through water until they find a suitable host, such as a cow or a sheep. Once inside the host, the cercariae burrow into the liver and transform into adult flukes.

In conclusion, F. hepatica is a small, flatworm that infects the liver of mammals and reproduces sexually. It has a simple anatomy, with a tubular gut, a small brain, and a pair of ganglia. The fluke's body is covered in a tough cuticle, and it has a mouth and an anus for feeding and excretion. Understanding the morphology of F. hepatica is important for understanding its life cycle and developing effective control and treatment measures.

(PDF) Fasciola hepatica : Morphology , Life cycle and Treatment

fasciola hepatica morphology

Patients with chronic infections experience hardening of the liver fibrosis as a result of long-term inflammation. Acute phase The acute phase of the disease is the initial one. After the larvae are ingested with contaminated food or water, a symptom-less incubation period starts, lasting for a few days to a few months. Few human cases have been reported locally. Its egg is hard to make difference from F. The digested food material is distributed by branching diverticula of intestine to all parts of the body as the circulatory system is not found in this animal.

Next

Fasciola Hepatica (Sheep Liver Fluke)

fasciola hepatica morphology

The miracidium penetrates a suitable snail intermediate host most commonly a species of the genus Lymnaea , in which a sporocyst, then rediae, then cercariae develop. Indirect methods Indirect methods are not related to the direct detection of the parasite, but rather to the identification of the antibodies that the host generates and that circulate throughout its bloodstream. It was found that snails were negative for any developmental stages after infection. Morphology of Fasciola Fasciola hepatica possesses mainly three stages of life egg, larva in snail , and adult worm. Infection of the definitive host is by ingestion of vegetation with metacercariae. Various developmental stages of lymnaeid snails from eggs to adult were studied under laboratory condition.

Next

Fasciola Hepatica: Habitat, Structure and Life History

fasciola hepatica morphology

The body wall plays a significant role in the physiology of fluke. Since then, various data concerning the epidemiology in snail intermediate hosts and cervid final hosts have been reported. Hence, snail is the secondary host. While its excretory system is of the protonephridial type. Sometimes nitazoxanide can also be used.

Next

Fasciola hepatica: characteristics, morphology, nutrition, diseases

fasciola hepatica morphology

This strategy could help to reduce potential negative impacts of this and other invasive parasites on host populations in Europe. The tegument of the fluke is covered with sharp spines. The longitudinal ducts are connected by a transverse vitelline duct which is positioned a bit above the middle line of the body. Definite host- Sheep, goat, cattle, or man. It is syncytial layer. The intestine is bifurcated into two caeca and gives off numerous branches or diverticula in order to carry food to all parts of the body. In regards to symmetry, Fasciola hepatica It has bilateral symmetry, since it is made up of two exactly equal halves.

Next

Morphological and molecular characterization of Fasciola hepatica and Fasciola gigantica phenotypes from co

fasciola hepatica morphology

We recommend assessment of introduction pathways and dispersal, continuous monitoring of host abundance and distribution and the prevalence of flukes in intermediate and final hosts, as well as coordinated and concerted actions with neighbouring countries. A sporocyst forms 5 to 8 rediae. Also, in some endemic areas, a serological test is used to establish a herd diagnosis. ABSTRACT The snail intermediate hosts of Fasciola gigantica include Radix Lymnaea auricularia and Radix Lymnaea luteola are widely distributed in various regions of Tamil Nadu. They unite with longitudinal vitelline ducts through small ducts.

Next

Fasciola Hepatica

fasciola hepatica morphology

However, it consists of a thick layer of cuticle followed by a thin basement membrane and underlying muscle layers surrounding the mesenchyma. Cercarias This larval stage cercariae have the ability to move freely through the water for an approximate period of time of about 10 hours. It is a thick chamber with glands. Taxonomy Phylum: Platyhelminthes Class: Trematoda Subclass: Digenea Order: Echinostomatiformes Family: Fasciolidae Among flukes of veterinary importance the closest relatives of F. Fasciola hepatica infection is increasingly recognized as an important zoonosis in many parts of the world, not including Canada, with major impacts on human health. Adaptations of the Adult Fluke: These can be accounted as under: 1. The eggs are to pass down the bile duct into the intestine of sheep and then to the outside with its faeces, hence, the fertilised eggs are enclosed in a chitinous covering, the shell, which protects the zygote from the enzymes of the host.


Next

Fasciola hepatica

fasciola hepatica morphology

The second stage is known as state. Diagnosis History and clinical signs may be useful for the diagnosis of F. Trotz medikamentöser Behandlung, eines Teils der betroffenen Wildpopulation hat sich der Parasit erfolgreich in den Auen beiderseits der Donau südöstlich von Wien etablieren können. Diese Strategie könnte negative Auswirkungen der Parasiten auf die europäischen Populationen potentieller Wirtsorganismen reduzieren und wichtige Informationen über die Mechanismen der Einschleppung und Ausbreitung pathogener Neobiota vermitteln. The lateral nerve cords are best developed and they run to the posterior end.


Next

FASCIOLA HEPATICA (SHEEP LIVER FLUKE) MORPHOLOGY AND PHYSIOLOGY

fasciola hepatica morphology

Morphological and molecular characterization of Fasciola hepatica and Fasciola gigantica phenotypes from co-endemic localities in Mpumalanga and KwaZulu-Natal provinces of South Africa - ScienceDirect JavaScript is disabled on your browser. Intermediate host interior Once it locates a host, the miracidium sits at the level of the snail's foot and slowly pierces its cells in order to enter its interior. In this sense, it belongs to the group of hematophages. The pharynx has pharyngeal glands. The miracidium produces a proteolytic enzyme which erodes the lower surface of the operculum.

Next