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Metacercariae of Pharyngostomum cordatum found from the European grass snake, Rhabdophis tigrina, and its experimental infection to cats
J Y Chai,W M Sohn,*H L Chung,**S T Hong and S H Lee
Department of Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul 110-460, Korea.
Abstract
The metacercariae of Pharyngostomum cordatum were found naturally infected in the European grass snake, Rhabdophis tigrina, purchased from a local snake collector in Jinju, Kyongsangnam-do. They were experimentally fed to several kinds of animals such as mice, rats, hamsters, ducklings, a dog, and cats. The adult worms were recovered from the cats 5 weeks after the infection, but none from other animals. The measurements and other morphological characters of the metacercariae and adults were both compatible with those of P. cordatum described by previous authors. The present study confirmed that the snake, Rhabdophis tigrina, serves as a second intermediate (or paratenic) host of P. cordatum in Korea.
Figures
Figs. 1-4 Fig. 1. A metacercaria of P. cordatum in fresh preparation, which is characteristically retaining its numerous round or elliptical excretory corpuscles.
Fig. 2. A metacercaria after stain with Semichon's acetocarmine, showing more obvious contour of each organ.
Fig. 3. Ventral view of a flattened adult P. cordatum after stain with Semichon's acetocarmine.
Fig. 4. An egg of P. cordatum isolated from the feces of an experimentally infected cat.
Tables
Table 1 Measurements* of P. cordatum metacercariae in comparison with those of previous authors
Table 2 Results of experimental infection of the metacercariae to animals
Table 3 Measurements of P. cordatum* adults in comparison with those described b
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