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Korean J Parasitol > Volume 35(4):1997 > Article

Original Article
Korean J Parasitol. 1997 Dec;35(4):223-232. English.
Published online Dec 20, 1997.  http://dx.doi.org/10.3347/kjp.1997.35.4.223
Copyright © 1997 by The Korean Society for Parasitology
Metagonimus miyatai sp. nov. (Digenea: Heterophyidae), a new intestinal trematode transmitted by freshwater fishes in Japan and Korea
S Saito,1J Y Chai,*2K H Kim,3S H Lee,2 and H J Rim4
1Department of Immunology and Parasitology, Yamagata University School of Medicine, Yamagata City 990-23, Japan.
Received November 07, 1997; Accepted November 26, 1997.


Metagonimus miyatai n. sp. (Digenea: Heterophyidae) is described based on adult flukes collected from experimental dogs and hamsters fed with metacercariae encysted in the sweetfish, Plecoglossus altivelis, dace, Tribolodon hakonensis and T. taczanowskii, common fat-minnow, Morocco steindachneri, pale chub, Zacco platypus, and dark chub. Zacco temmincki, and on those collected from naturally infected humans. The new species was morphologically compared with M. yokogawai and M. takahashii obtained from experimental animals fed with the sweetfish and the crucian carp, Carassius carassius, respectively. The uterine loops of M. miyatai reached near the posterior end of the body through the space between the two testes, whereas those of M. yokogawai, occupied only the space between the acetabulum and anterior border of two testes. This uterine tubule distribution was similar to that of another closely related species, M. takahashii. However, vitellaria of M. miyatai ended in front of the posterior end of the left testis, while those of M. takahashii reached the posterior end of the left testis and ran it over. By raising M. miyatai as a new species, differentiation of M. yokogawai and M. takahashii became very clear. A key to the species of the genus Metagonimus in the Far East has been proposed.


Figs. 1-10
Figs. 1-3. Adults of M. miyatai n. sp. from dogs about two weeks post-feeding of metacercariae. Fig. 1. A holotype originating from the scale of P. altivelis in the Oguni River, Funagata Town, Yamagata Prefecture. Fig. 2. A paratype from Z. temmincki caught in the Ohta River, Hiroshima City. Fig. 3. A paratype from M. steindachneri from the Daimon River, Yamagata city. Fig. 4. An adult of M. yokogawai from a dog 16 days post-feeding of metacercariae encysted in the muscle of P. altivelis from the Ohta River. Fig. 5. An adult of M. takahashii from a dog 13 days post-feeding of the metacercariae encysted under the scale of Z. temmincki from the Ohta River. Fig. 6. Metacercariae of M. yokogawai from P. altivelis. Fig. 7. Metacercariae of M. miyatai from M. steindachneri. Fig. 8. Metacercariae of M. takahashii from C. carassius. Fig. 9. Posterior part of an excysted metacercaria of M. miyatai. C, caecum; L, Laurer's canal; R, seminal receptacle; T, testis; U, uterus. Fig. 10. An excysted metacercria of M. yokogawai stained with PAS(dorsal view). Bar indicates 500 µm.


Table 1
Comparative measurementsa) of the adults of three species of the genus Metagonimus from experimental dogs and hamsters

Table 2
Comparative measurementsa) of the eggs of three species of the genus Metagonimus from the feces of experimentally infected dogs and hamsters

Table 3
Comparative measurementsa) of the metacercariae of three species of the genus Metagonimus

1. Ahn YK. [Intestinal flukes of genus Metagonimus and their second intermediate hosts in Kangwon-do]. Korean J Parasitol 1993;31(4):331–340.
2. Ahn YK, Ryang YS. [Epidemiological studies on Metagonimus infection along the Hongcheon river, Kangwon province]. Korean J Parasitol 988;26(3):207–213.
3. Asada J. Rinsho Igaku 1934;22:179–192.
4. Asada J, et al. Tokyo Iji Shinshi 1957;74(6):325–330.
5. Chai JY, Huh S, Yu JR, Kook J, Jung KC, Park EC, Sohn WM, Hong ST, Lee SH. An epidemiological study of metagonimiasis along the upper reaches of the Namhan River. Korean J Parasitol 1993;31(2):99–108.
6. Chai JY, Lee SH. Intestinal trematodes of humans in Korea: Metagonimus, heterophyids and echinostomes. Korean J Parasitol 1990;28 Suppl:103–122.
7. Chai JY, Sohn WM, Kim MH, Hong ST, Lee SH. Three morphological types of the genus Metagonimus encysted in the dace, Tribolodon taczanowskii, caught from the Sumjin River. Korean J Parasitol 1991;29(3):217–225.
8. Ciurea J. Ztschr. f. Infektionskr. d. Haustiere 1915;16:445–458.
figs. 103 dans texte Pl. I, 1-4.
9. Ciurea J. Parasitology 1924;16:1–21.
Pls. I-4.
10. Ishii N, et al. Tokyo Iji Shinshi 1959;7:149–151.
11. Ito J. Prog Med Parasit in Japan 1964;1:315–393.
12. Izumi M. Tokyo Iji Shinshi 1935;2929:1224–1236.
13. Katsuda I. Taiwan Igakkai Zasshi 1932;31(2):26–39.
14. Katsurada F. Okayama Igakkai zasshi 1912;(273):768–778.
15. Kim CH. [Study on the Metagonimus sp. in Gum river basin, Chungchung-nam Do, Korea]. Korean J Parasitol 1980;18(2):215–228.
16. Kim CH, Kim NM, Lee CH, Park JS. [Studies on the Metagonimus fluke in the Daecheong reservoir and the upper stream of Geum river, Korea]. Korean J Parasitol 1987;25(1):69–82.
17. Kobayashi H. Saikingaku Zasshi 1912;204:4–10.
18. Koga G. Igaku Kenkyu 1938;12:3471–3528.
19. Kogane Y. Tokyo Iji Shinshi 1939;3127:793–796.
20. Komiya Y. Prog Med Parasit in Japan 1965;2:1–328.
21. Komiya Y, et al. Jpn J Parasitol 1958;7:7–11.
22. Miyata I. Shokubutsu Oyobi Cobustsu 1941;9:533–534.
23. Miyata I. Dobutsugaku Zasshi 1944;56(1-3):16–19.
24. Mori J. Tokyo Iji Shinshi 1935;2925:2679–2686.
25. Ochi G. Tokyo Iji Shinshi 1957;74:581–599.
26. Rim HJ, Kim KH, Joo KH. Classification and host specificity of Metagonimus spp. from Korean freshwater fish. Korean J Parasitol 1996;34(1):7–14.
27. Saito S. Niigata Igakkai Zasshi 1968a;82:679–693.
Pl. I.
28. Saito S. Niigata Igakkai Zasshi 1968b;82:694–706.
Pls. I-III.
29. Saito S. Jpn J Parasitol 1972;21:449–458.
30. Saito S. Proc Parasite Taxon Morphol Meet No 1984;2:1–4.
31. Saito S, et al. Jpn J Parasitol 1968;17:167–174.
32. Saito S, et al. Jpn J Parasitol 1982;31 suppl:64.
33. Shimizu T. Niigata Igakkai Zasshi 1970;84:1–22.
34. Suzuki N, et al. Nippon Noson Igakkai Zasshi 1963;11:4–15.
35. Takabayashi Y. Gifukenritsu Ika Daigaku Kijo 1953;1:219–226.
36. Takahashi S. Okayama Igakkai Zasshi 1929;41:2687–2755.
37. Yoshimura H, et al. Jpn J Parasitol 1972;21:400–407.
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