Surface ultrastructure of metagonimus takahashii metacercariae and adults

Jong Yil Chai, Sang Mee Guk, Eun Taek Han, Min Seo, Eun Hee Shin, Woon Mok Sohn, Sung Yil Choi, Soon Hyung Lee

Research output: Contribution to journalArticle

12 Scopus citations


A scanning electron microscopic study was performed on the surface ultrastructure of metacercariae and adults of Metagonimus takahashii. Metacercariae were collected from the scale of crucian carp (Carassius auratus), and adult flukes were harvested 1-4 weeks after infection to rats. In excysted metacercariae, the oral sucker had type I (numerous) and type II (seven in total) sensory papillae. Tegumental spines were dense and digitated into 5-7 points on the surface anterior to the ventral sucker, but became sparse and less digitated posteriorly toward the end of the body. In adults, seven type II sensory papillae were characteristically arranged around the lip of the oral sucker, and on the inner side of the lip four small and two large type I sensory papillae were symmetrically seen on each side (12 in total). Tegumental spines on anterior two-thirds of the body, were digitated with 9-12 tips ventrally and 8-13 tips dorsally. Sperms entering into the Laurer’s canal were observed. The results show that the surface ultrastructure of M. takahashii is generally similar to those of M. yokogawai and M. miyatai except for the digitation of tegumental spines.

Original languageEnglish
Pages (from-to)9-15
Number of pages7
JournalKorean Journal of Parasitology
Issue number1
StatePublished - Mar 2000


  • Adult
  • Metacercaria
  • Metagonimus takahashii
  • Sensory papilla
  • Surface ultrastructure
  • Tegumental spine

Cite this

Chai, J. Y., Guk, S. M., Han, E. T., Seo, M., Shin, E. H., Sohn, W. M., Choi, S. Y., & Lee, S. H. (2000). Surface ultrastructure of metagonimus takahashii metacercariae and adults. Korean Journal of Parasitology, 38(1), 9-15.