One Clonorchis sinensis and 3 Echinostoma hortense recovered from a patient after treatment.

Egg of Echinostoma hortense in the feces of an infected patient. See the operculum on the top of the egg and the terminal wrinkling at its bottom. x 400.

Matured eggs of Echinostoma hortense, operculated, yellowish brown with wrinkled thickening of shell, and showing the miracidium in egg shell. X 450.

Egg of Echinostoma hortense.

A metacercaria of Echinostoma hortense encysted in the muscle of a freshwater fish, Odontobutis obscura interrupta. x 40.

A redia of Echinostoma hortense, liberated from the freshwater snail, Lymnaea pervia. X 40.

Motile cercaria of Echinostoma hortense under a cover slip, showing lustrous exceretory granules.

Miracidium of Echinostoma hortense, hatching start on 10th days of cultivation.

Miracidium of E. hortense.

The epidermal plate of E. hortense miracidium.

The second generation redia of E. hortense.

Cercaria of E. hortense from an experimental lymnaeid snail, Fossaria truncatula.

Metacercariae of E. hortense encysted in the gill of tadpole, which was experimentally challenged with cercariae.

Metacercaria of E. hortense encysted in the muscle of tadpole, which was experimentally challenged with cercariae.

Metacercaria of E. hortense encysted in the muscle of a Squalidus japonicus.

An adult fluke of Echinostoma hortense recovered from a patient, acetocarmine stained. x 10.

Numerous adult flukes of Echinostoma hortense recovered from a patient living in an endemic area.

Adult worm of Echinostoma hortense.

E. hortense recovered from a rat, which was experimentally infected with metacercariae.

E. hortense adult worms collected from human after treatment with praziquantel.

E. hortense from human. Semichon's acetocarmine stained.

E. hortense collected from a cat. Semichon's acetocarmine stained.

E. hortense recovered from a rat, which was experimentally infected with metacercariae. Semichon's acetocarmine stained.

A freshwater fish, Odontobutis obscura interrupta, playing the role of the second intermedtae host for Echinostoma hortense.

A species of freshwater fish, Odontobutis obscura interrupta, a second intermediate host for Echinostoma hortense.

Radix auricularia coreana : first intermediate host of Echinostoma hortense

Coreoperca herzi, Korean brook perch.

Cobitis sinensis, spined loach.

Odontobutis obscurus interrupta, dark sleeper.

Phoxinus oxycephalus, upstream fatminnow.

An adult fluke (arrow) of Echinostoma hortense attached at the mucosa of the gastric pylorus of a patient, seen through gastrofiberscopy. See some bleeding from the infected site.

Mucosal mastocytosis in the duodenum of a rat inected with Echinostoma hortense on 35 days. Blue spots represent mast cells stained with alcian blue and safranin(X 40).

Mucosal mastocytosis in the duodenum of a rat infected with Echinostoma hortense on 35 days. Blue spots represent mast cells stained with alcian blue and safranin(X 200).

Mucosal mastocytosis in the duodenum of a rat infected with Echinostoma hortense on 35 days. Blue spots represent mast cells stained with alcian blue and safranin(X 200).

The rat intestine infected with E. hortense.