Echinostoma是什么意思，Echinostoma翻译

Echinostoma是什么意思，Echinostoma翻译

Echinostoma: An Overview

Echinostoma is a genus of trematodes, commonly known as blood flukes, parasitizing the intestines of vertebrates. They are characterized by a complex life cycle involving two hosts: a primary host, typically a mollusk, and a secondary host, which can be a fish or an amphibian. The genus Echinostoma includes several species, such as Echinostoma capitatum, Echinostoma trivolvatum, and Echinostoma multiloculatum.

Life Cycle and Morphology

The life cycle of Echinostoma begins when an adult fluke releases eggs into the host's intestine. These eggs are then excreted in the feces and released into the environment. After passing through a intermediate host, such as a snail, the eggs develop into a larval stage called a cercaria. The cercaria then infects the secondary host, which can be a fish or an amphibian, by invading its skin.

In the secondary host, the fluke undergoes further development, molting through several larval stages before reaching adulthood. The adult flukes reproduce sexually, producing eggs that are once again excreted in the host's feces. This completes the life cycle of Echinostoma.

Adult Echinostoma flukes have a characteristic teardrop shape and possess a primitive nervous system, including a cerebral ganglion and ventral and dorsal nerve cords. They also have a well