Egg of Spirometra erinacei from a cat.

Egg of Spirometra erinacei from a cat, which was experimentally infected.

Embryonated egg of Spirometra erinacei, which was experimentally incubated and matured.

Scolex of a sparganum. Sparganum is a larval tapeworm of the genus Spirometra that is common in various canines and felines, causes sparganosis in humans.

A sparganum is penetrating the intestinal wall to the peritoneal cavity in a mouse. x200.

A section of sparganum, hematoxylin-eosin stained, shows a thick tegument, subtegumental muscle layer, and calcospherules. The calcospherules appear in shapes with variopus intrastuctures such as concentric circles and stainabilities. x400.

Coracidium of S. erinacei.

SEM view of the coracidium of S. erinacei.

Magnified SEM view of the coracidium of S. erinacei.

TEM view of the coracidium of S. erinacei.

SEM view of the procercoid of Spirometra erinacei.

SEM view of the procercoid of Spirometra erinacei.

SEM view of the microtriches in procercoid of Spirometra erinacei.

Plerocercoid of Spirometra erinacei in the intestinal wall of tadpole which was experimentally infected with procercoid.

A plerocercoid of Spirometra erinacei isolated from an experimental tadpole at 1 day after infection.

A plerocercoid of Spirometra erinacei isolated from an experimental tadpole at 11 day after infection.

Plerocercoids of Spirometra erinacei (spargana) recovered from an experimental tadpole at 30 day after infection.

A spargana collected from snakes.

SEM view of a 3-day-old plerocercoid of Spirometra mansonoides.

Frontal view of 3-day-old plerocercoid of Sprimetra mansonoides by SEM.

SEM view of a 10-day-old plerocercoid.

Microtriches in a 10-day-old plerocercoid.

TEM view of a plerocercoid of Spirometra erinacei.

SEM view of the scolex of Spirometra erinacei, lateral side.

SEM view of the scolex of Spirometra erinacei, frontal view.

SEM view of the microtriches on the anterior portion of scolex.

SEM view of the microtriches in the mid-portion of scolex.

SEM view of the microtriches on the neck portion and the lower proglottids.

Gravid proglottid of Spirometra erinacei, Semichon's acetocarmine stained.

Procercoid of Spirometra erinacei in Cyclops, which was experimentally infected with coracidia.

Rana nigromaculata.

Dinodon rufozonatum rufozonatum.

Rhabdophis tigrinus tigrinus.

Agkistrodon brevicaudus, an intermediate host of Spirometra erinacei.

Sparganum in human inguinal lesion. H&E, X40.

Sectional view of the human skin with sparganum, H&E stained.