Metagonimus takahashii

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Metagonimus takahashii
Metagonimus takahashii (SEM view of an egg)
Scientific classification
M. takahashii
Binomial name
Metagonimus takahashii

Metagonimus takahashii is a species of a trematode, or fluke worm, in the family Heterophyidae.

It is a human parasite causing metagonimiasis.

Life cycle

The first intermediate hosts of Metagonimus takahashii include freshwater snails Semisulcospira coreana[2][3] and Koreanomelania nodifila.[2][3]

The second intermediate host include freshwater fish: crucian carp Carassius carassius, common carp Cyprinus carpio, and Tribolodon brandtii.[2]

Natural definitive hosts are humans.[2][4] Experimental definitive hosts are: mice, and dogs.[2][4]


This species occurs in Japan and Korea.[2]


An infected individual may experience abdominal pain and diarrhea[5] The diagnosis is done via stool sample[6] and management is via praziquantel, which is recommended [7]


  1. (in Japanese) Takahashi S. (1929). "On the life history of Metagonimus and Exorchis major. Okayama Igakkai Zasshi 41: 2687–2755.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 Chai J. Y., Darwin Murrell K. & Lymbery A. J. (2005). "Fish-borne parasitic zoonoses: Status and issues". International Journal for Parasitology 35(11-12): 1233-1254. doi:10.1016/j.ijpara.2005.07.013.
  3. 3.0 3.1 Waikagul J. & Thaekham U. (2014). Approaches to Research on the Systematics of Fish-Borne Trematodes. Academic Press, 130 pp., page 97.
  4. 4.0 4.1 Chai J.-Y., Guk S.-M., Han E.-T., et al. (2000). "Surface ultrastructure of Metagonimus takahashii metacercariae and adults". The Korean Journal of Parasitology 38(1): 9-15. doi:10.3347/kjp.2000.38.1.9.
  5. "Metagonimiasis - About the Disease - Genetic and Rare Diseases Information Center". Archived from the original on 17 May 2022. Retrieved 7 September 2023.
  6. "CDC - DPDx - Metagonimiasis". 21 January 2019. Archived from the original on 7 June 2023. Retrieved 7 September 2023.
  7. Mahanta, Jagadish (2022). "Metagonimiasis". Textbook of Parasitic Zoonoses. Springer Nature. pp. 309–316. ISBN 978-981-16-7204-0. Archived from the original on 10 September 2023. Retrieved 7 September 2023.

External links