The life cycle of Fasciola gigantica is as follows: eggs (transported with feces) → eggs hatch → miracidium → miracidium infect snail. Life ca passes its life cycle in two different hosts. • Definitive hosts- Sheep,goat, cattle or man. Adult worm in the biliary passages of the liver. Keywords: Fasciola gigantica, life history, biological characteristic, The general life cycle of fasciolids is described in the following passage.

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The adult flukes Fasciola hepatica: Parasitol al Dia ; The larvae are transmitted to the intermediate hosts, which in many cases are vegetation, as well as to the definitive hosts. Fasciola Animal diseases Veterinary helminthology Animals described in The results can be applied for treatment, management, and control of these parasitic infections.

Infectious diseases Parasitic disease: Species of the freshwater snails from the family Lymnaeidae are well known for their role as intermediate hosts in the life cycle of Fasciola gigantica ; however, throughout the years an increasing number of other molluscan intermediate hosts of F.

Juvenile and adult flukes were recovered from 16 mice experimentally infected with metacercariae, with the average recovery rate of Strongyloides stercoralis Strongyloidiasis Trichostrongylus spp. Please review our privacy policy.


In places where both F. If the miracidium are to come in contact with a snail it actively penetrates it. The surface is completely occupied with cilia.

Johnson and Thieltges, Fascioliasis is caused by Fasciola hepatica and less often by F. Fasciolopsis buski Fasciolopsiasis Metagonimus yokagawai Metagonimiasis Heterophyes heterophyes Heterophyiasis. Sexually mature adult flukes were recovered from day 42 PI.


December 8, Content source: The cercaria is tadpole-like bigantica a discoidal body and a long tail.

The sporocyst was oval, the redia was roughly cylindrical, and the cercaria was tadpole-like with a long tail. Laboratory Diagnosis Diagnostic Findings Microscopic identification of eggs is useful in the chronic adult stage.

The genital pore was initially revealed on day 9 PI, while ceca were found on day 18 PI. The cercariae are released from the snail and encyst as metacercariae on aquatic vegetation or other surfaces.

The obtained information can be used as a guide for prevention, elimination, and treatment of F. The miracidia form into saclike sporocysts and multiply into rediae which then develop into cercariae.


Our findings show that L. After then, miracidia were placed in each clay pot. Infection with Fasciola spp. The habitat of Fasciola gigantica changes with the stage of its life cycle. Active cercariae emerged from the snail and swam freely to search for the substrate for encystment. Adults expel eggs and these are evacuated in the feces of the definitive host, usually cows or buffaloes.

Illustration demonstrating the development of the larval stages of F. The metacercarial cysts were protected with capsules, which had a double thick wall that consisted of an outer cyst and an inner cyst, all of which were of equal size to the cyst of F. For an overview including prevention and control visit www.

Ingestion of Fasciola gigantica metacercariae by the intermediate host gigwntica, Lymnaea ollula, and infectivity of discharged metacercariae.

AA DordrechtThe Netherlands: The drug is given orally in single or multiple doses and has few side effects. Adequate amounts of moisture are also needed, these factors can account for the intensity and prevalence of infection in the definitive hosts. The life cycle was completed when the metacercariae were eaten by a mammalian definitive host. Hatching began to occur on day 11, while most eggs hatched on day Fasciola hepatica and Paramphistomum daubneyi: Enter Email Address What’s this?


Germinal cells are scattered at the posterior segment Fig. Help us improve the site by taking our survey. The species of Fasciola can become adapted to new intermediate hosts under certain conditions at least based on laboratory trials.

CDC – Fasciola – Biology

Morphologic comparison with other intestinal parasites. Fascola ingestion, the metacercariae excyst in the duodenum and migrate through the intestinal wall, the peritoneal cavity, and the liver parenchyma into the biliary ducts, where they develop into adult flukes.

Fasciola gigantica Pathogen — Liver Trematodes. Immature eggs are discharged in the biliary ducts and in the stool. Cobbold’s drawing of Fasciola gigantica. Free-swimming cyxle were immediately allowed to adhere to rice plants, and capsules were gigantics to protect metacercariae on rice plants.

Synapomorphy of the Anthozoa. Pseudosuccinea columella, a lymnaeid snail that has been introduced into South America and serves as an intermediate host for F. Juvenile worms were detected in intestines of mice at days 3 and 6 PI, but they were found in the bile duct from day 9 PI. Fully-developed cercariae were separated from the redia and shed from the snails on day 39 post-infection PI.

Life Cycle Immature eggs are discharged in the biliary ducts and in the stool.