Digenetic

Digenetic refers to a subclass of parasites that undergo a two-host life cycle, involving both a primary (definitive) and secondary (intermediate) host. The term is most commonly used in the field of parasitology to describe the life cycle of certain trematodes, or flukes.

Life Cycle

The life cycle of digenetic parasites typically begins with the adult parasite residing in the primary host, where sexual reproduction occurs. The resulting eggs are then excreted by the primary host and ingested by the secondary host. Within the secondary host, the eggs hatch into larvae, which undergo a series of developmental stages before becoming infective to the primary host. The cycle is completed when the primary host ingests the secondary host, thereby ingesting the infective larvae.

Digenetic Trematodes

Digenetic trematodes are a group of flatworms that include some of the most significant parasites of humans and livestock. They include species such as Schistosoma, which causes schistosomiasis, and Fasciola hepatica, the liver fluke, which causes fascioliasis. These parasites have complex life cycles involving two hosts and multiple stages of development.

Impact on Human Health

Digenetic parasites can have a significant impact on human health. Diseases caused by these parasites, such as schistosomiasis and fascioliasis, can lead to serious health complications including liver damage, kidney failure, and even death. Control and prevention of these diseases is a major focus of public health efforts worldwide.

See Also

• Parasitology
• Trematodes
• Schistosomiasis
• Fascioliasis

References

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