Morfología Ciclo vital. Hospedadores Género: Fasciola Filo:Platyhelminthes. Hospedador definitivo. Afecta principalmente a bovinos, ovinos. Fasciola Hepatica Víctor Cortés Sánchez Departamento de Agentes . También fue el primer ciclo explicado: Leuckart ; Thomas Capillaria hepatica is a parasitic nematode which causes hepatic capillariasis in rodents and . Moravec, F (). “Proposal of a . Fasciola hepatica/gigantica.
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Fascioliasis is caused by Fasciola hepatica and less often by F.
Some human giologico have been caused by hybrid species. Additional Fasciola species have been found in animals. As shown below, Fasciola parasites develop into adult flukes in the bile ducts of infected mammals, which pass immature Fasciola eggs in their feces.
The next part of the life cycle occurs in freshwater. After several weeks, the eggs hatch, producing a parasite form known as the miracidium, which then infects a snail host.
Under optimal conditions, the development process in the snail may be completed in 5 to 7 weeks; cercariae are then shed in the water around the snail. The cercariae lose their tails when they encyst as metacercariae infective larvae on water plants.
In contrast to cercariae, metacercariae have a hard outer cyst wall and can survive for prolonged periods in wet environments. Immature Fasciola eggs are discharged in the biliary ducts and in the stool.
Eggs become embryonated in watereggs release miracidiawhich invade a suitable snail intermediate hostincluding the genera Galba, Fossaria and Pseudosuccinea.
In the snail biopogico parasites undergo several developmental stages sporocystsrediaeand cercariae. The cercariae are released from the snail and encyst as metacercariae on aquatic vegetation or other surfaces.
Mammals acquire the infection by eating vegetation containing metacercariae.
Humans can become infected by ingesting metacercariae-containing freshwater plants, especially watercress. After 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.
In humans, maturation from metacercariae into adult biologifo takes approximately 3 to 4 months. The adult flukes Fasciola hepatica: Fasciola hepatica infect various animal species, mostly herbivores plant-eating animals.
Fascioloides magna – Wikipedia
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Life cycle image hepaticw information courtesy of DPDx. Get Email Updates To receive email updates about this page, enter your email address: January 10, Page last updated: January 10, Content source: Global Health — Division of Parasitic Diseases.