Warning: mkdir(): Permission denied in /home/virtual/lib/view_data.php on line 81
Warning: fopen(upload/ip_log/ip_log_2024-04.txt): failed to open stream: No such file or directory in /home/virtual/lib/view_data.php on line 83
Warning: fwrite() expects parameter 1 to be resource, boolean given in /home/virtual/lib/view_data.php on line 84 Studies on intestinal trematodes in Korea XX. Four cases of natural human infection by Echinochasmus japonicus
Studies on intestinal trematodes in Korea XX. Four cases of natural human infection by Echinochasmus japonicus
Byong Seol Seo,Soon Hyung Lee,Jong Yil Chai and Sung Jong Hong
Department of Parasitology and Institute of Endemic Diseases, College of Medicine, Seoul National University, Seoul 110, Korea.
Abstract
Four cases of human infection by Echinochasmus japonicus (Trematoda; Echinostomatidae) were proven by the recovery of adult worms after a treatment with praziquantel (10 mg/kg in single dose) and purgation in February 1984 in Korea. The patients were 3 middle-aged men and 1 elderly woman residing in a riverside village of Kangjin-gun ( Tamjin river), Jeonranam-do, an ever-known endemic area of metagonimiasis. The treatment revealed numerous M. yokogawai worms together with 1-43 (total 54 ) specimens of E. japonicus and/or a few number of other kinds of trematodes or cestodes. The patients had gastrointestinal troubles such as indigestion and abdominal discomfort, probably due to these fluke infections. They have been eating some raw flesh of fresh water fishes such as cyprinoid ones or sweetfish caught from the river. This is the first record of human E. japonicus infection in the literature.
Figures
Figs. 1-2 Fig. 1. A specimen of E. japonicus (dorsal view) recovered from a naturally infected man (Case No. 3 in Table 1), showing its prominent head crown with some collar spines, two uterine eggs (black), and several other organs. Acetocarmine stained (Scale: 0.2mm).
Fig. 2. Another specimen (ventral view) from Case No. 4, showing ventral sucker, cirrus sac, ovary and two testes. But no egg is seen in this specimen. Acetocarmine stained (Scale: 0.2mm).
Figs. 3-4 Fig. 3.Ibid (dorsal view), from Case No. 4, showing oral sucker (os), pharynx (ph), cirrus sac (cs), ventral sucker (vs), one uterine egg (e), ovary (ov), and testes (t). Note the distribution of vitelline glands from the level of ventral sucker to the posterior end of body. Acetocarmine stained (Scale: 0.2mm).
Fig. 4. A drawn figure of the worm in Fig. 3 (Scale: 0.2mm).
Figs. 5-6 Fig. 5. Magnification of the head crown with collar spines (arrows) in a worm from Case No. 4. Note the shape and arrangement of spines (Scale: 0.02mm).
Fig. 6. Two uterine eggs of E. japonicus, showing their characteristic shape and a small operculum on the upper pole portion (Scale: 0.02mm).
Tables
Table 1 Cases of E. japonicus and/or other helminth infections
Table 2 Measurements* of E. japonicus recovered from 4 human cases
References
1.
Seo BS, Lee SH, Chai JY, Hong SJ. Studies on intestinal trematodes in Korea XX. Four cases of natural human infection by Echinochasmus japonicus. Korean J Parasitol 1985;23(2):214–220.
2.
Chai JY, Hong SJ, Son DW, Lee SH, Seo BS. [Metacercariae of Echinochasmus japonicus encysted in a fresh water fish, Pseudorasbora parva, and their development in experimental mice]. Korean J Parasitol 1985;23(2):221–229.
3.
Chun SK. Bull Pusan Fish Coll 1964;VI(1):1–14.
4.
Eom KS, Rim HJ, Jang DH. A Study On The Parasitic Helminths Of Domestic Duck(Anas Platyrhynchos Var. Domestica Linnaeus) In Korea. Korean J Parasitol 1984;22(2):215–221.
5.
Hirasawa I. Tokyo Iji Shinshi 1928;2577:1328–1334.
6.
Joo CY. [Infestation of larval trematodes from fresh-water fish and brackish-water fish in River Hyungsan, Kyungpook Province, Korea]. Korean J Parasitol 1984;22(1):78–84.
7.
Kim SS, et al. Korea Univ Med J 1982;19(1):91–105.
8.
Komiya Y. Progress of Med Parasitol 1965;2:1–328.
9.
Kurisu Y. Kummamoto Igakkai Zasshi 1932;8:283–298.
10.
Lee DM, et al. Kyungpook Univ Med J 1979;20(2):219–233.
11.
Lee HS. Korean J Vet Res 1979;19:57–61.
12.
Lee JT. [Studies on the metacercariae from fresh water fishes in the Kum-Ho River]. Korean J Parasitol 1968;6(3):77–99.
13.
Rhee JK, Lee HI, Baek BK, Kim PG. [Survey On Encysted Cercariae Of Trematodes From Fresh-Water Fishes In Mangyeong Riverside Area]. Korean J Parasitol 1983;21(2):187–192.
14.
Ryang YS, Ahn YK, Lee KW, Kim TS, Han MH. [Two cases of natural human infection by Echinostoma hortense and its second intermediate host in Wonju area]. Korean J Parasitol 1985;23(1):33–40.
15.
Seo BS, Cha IJ, Chai JY, Hong SJ, Lee SH. Studies on intestinal trematodes in Korea XIX. Light and scanning electron microscopy of Fibricola seoulensis collected from albino rats treated with praziquantel. Korean J Parasitol 1985;23(1):47–57.
16.
Seo BS, et al. Seoul J Med 1980;21(1):21–29.
17.
Seo BS, Hong ST, Chai JY, Lee SH. Studies On Intestinal Trematodes In Korea: VIII. A Human Case Of Echinostoma Hortense Infection. Korean J Parasitol 1983;21(2):219–223.
18.
Seo BS, et al. Seoul J Med 1985;26(3):207–212.
19.
Tanabe H. Okayama Igakkai Zasshi 1922;387:1–20.
20.
Tanabe H. Nippon Byori Gakkai Kaishi 1926;16:295–296.
21.
Tani S, et al. Jpn J Parasitol 1974;23(6):404–408.
22.
Ujiie N. Taiwan Igakkai Zasshi 1936;35:535–546.
23.
Yamaguti S. Jpn J Zool 1939;8(2):131–210.
24.
Yamaguti S. Okayama Arch Med Fak 1951;7:338–342.
25.
Yamashita J. progress of Med Parasitol 1964;1:289–313.
26.
Yoshikawa M, et al. Nippon Juigaku Zasshi 1940;2:450–464.
PDF Links
Full text via DOI
Download Citation 
