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Korean J Parasitol > Volume 31(4):1993 > Article

Original Article
Korean J Parasitol. 1993 Dec;31(4):347-352. English.
Published online Mar 20, 1994.  http://dx.doi.org/10.3347/kjp.1993.31.4.347
Copyright © 1993 by The Korean Society for Parasitology
Larval Gnathostoma nipponicum found in the imported Chinese loaches
W M Sohn,*1W G Kho,1 and S H Lee2
1Department of Parasitology, College of Medicine, Inje University, Pusan 614-735, Korea.
Received September 25, 1993; Accepted October 19, 1993.


Six early third-stage larvae of Gnathostoma nipponicum were recovered from the muscle of 376 loaches, Misgurnus anguillicaudatus, imported from China. They were 614 × 114 µm in average size, almost colorless except brownish intestine, and encircled by about 229 transverse rows of minute cuticular spines. Their head bulbs provided with 3 rows of hooklets, of which average number were 34.5 on the first, 36.7 on the second and 39.7 on the third. Accordingly, it is revealed that the Chinese loach is a natural second intermediate host of G. nipponicum and G. nipponicum has been distributed somewhere in China. This parasite may infect human when the imported loaches are consumed raw.


Figs. 1-4
Fig. 1-2. Early third stage larvae of G. nipponicum recovered from the imported Chinese loaches (A: anus, C: cervical sac, E: esophagus, G: lateral line, H: head bulb, I: intestine, L: lip, P: cervical papilla). Fig. 3-4. Head bulbs of the larval G. nipponicum. Note the 3 rows of hooklets, their shape and bases.


Table 1
Infection status of the helminth larvae in loaches* imported from China

Table 2
Measurementsa) of G. nipponicum larvae recovered from the loach of China

Table 3
Comparison of the measurementsa) of G. nipponicum larvae by authors

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