PMID: 8591006Dec 1, 1995Paper

Surface ultrastructure of metacercaria and adult of Gymnophalloides seoi (Digenea: Gymnophallidae)

The Korean Journal of Parasitology
M H ChoiS H Lee

Abstract

The surface ultrastructure of metacercariae and adults of Gymnophalloides seoi, the only known gymnophallid infecting humans, was observed by scanning electron microscopy. Metacercariae were ovoid or pyriform in shape and slightly concave ventrally. The oral sucker had two sizes of type I papillae, small and large, encircling its lip. Type I papillae were arranged in a row on both side of the body. The ventral pit had several type I papillae on its inner surface. The ventral sucker was covered with cobble-stone like cytoplasmic processes and had 6 type I papillae on its lip. The surface of the body was covered with the tegumental spines except for the ventromedian area between the two suckers. The spines at anterior body were digitated into 3-5 points, and their size decreased at posterior one third of the body. Adult worms were rhomboid or ellipsoid in shape and covered with tegumental spines except for the ventromedian area. The shape and distribution of the tegumental spines and sensory papillae were similar to those of metacercariae. However, sensory papillae arranged in a row on the ventral surface of metacercariae were not observed in adults. The ventral pit became larger and more prominent as the fluke grew. It is sugges...Continue Reading

References

Aug 1, 1975·Experimental Parasitology·C E Bennett, L T Threadgold
Sep 1, 1994·The American Journal of Tropical Medicine and Hygiene·S H LeeY J Lim
Jun 1, 1984·Kisaengch'unghak chapchi. The Korean journal of parasitology·Byong Seol SeoSung Jong Hong

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Citations

Oct 15, 1998·International Journal for Parasitology·O JoussonJ Pawlowski
Mar 20, 2003·Trends in Parasitology·Jong-Yil ChaiSoon-Hyung Lee

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