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Adult flukes Fasciola hepatica in bile ducts (liver of goat). The course of fasciolosis in humans has 4 main phases: [7] Incubation phase: from the ingestion of metacercariae to the appearance of the first symptoms; period: few days to 3 months; depends on the number of ingested metacercariae and immune status of the host
Fasciola hepatica, also known as the common liver fluke or sheep liver fluke, is a parasitic trematode (fluke or flatworm, a type of helminth) of the class Trematoda, phylum Platyhelminthes. It infects the livers of various mammals , including humans, and is transmitted by sheep and cattle to humans all over the world.
Evidence of fascioliasis in humans exists dating back to Egyptian mummies that have been found there are with Fasciola eggs. [14] Cercariae of F. hepatica in a snail and flukes infecting sheep were first observed in 1379 by Jehan De Brie. [13] [15] The life cycle and hatching of an egg were first described in 1803 by Zeder. [16]
Trematodes are parasitic flatworms of the class Trematoda, specifically parasitic flukes with two suckers: one ventral and the other oral. Trematodes are covered by a tegument, that protects the organism from the environment by providing secretory and absorptive functions. The life cycle of a typical trematode begins with an egg.
Fasciola hepatica Egg of Dicrocoelium sp. Liver fluke is a collective name of a polyphyletic group of parasitic trematodes under the phylum Platyhelminthes. [1] They are principally parasites of the liver of various mammals, including humans. Capable of moving along the blood circulation, they can occur also in bile ducts, gallbladder, and ...
A parasite called Heterobilharzia americana, a flatworm commonly referred to as liver fluke, was behind the illness of the 11 dogs. The parasite normally makes its home in Texas and in the South.
Their life-cycle includes an intermediate host, ... Fasciola hepatica – Common liver fluke; Fasciola gigantica; Fasciola spp. – Japanese strain; Fascioloides.
The life cycle of F. magna is relatively complex and is similar to the development of the related fluke, F. hepatica. A detailed account of the F. magna life cycle was given by Swales (1935), Erhardová-Kotrlá (1971), and reviewed by Pybus (2001). [1] [2] [4] The cercariae of F. magna shed from the snail.