Epidemiological studies of digenetic trematodes in Yongyang County, Kyungpook Province

, Chung, D I; , Kim, Y I; , Lee, K R; , Choi, D W

doi:1991.29.4.325

Korean J Parasito > Volume 29(4):1991 > Article

Original Article


Korean J Parasitol. 1991 Dec;29(4):325-338. English. Published online Mar 20, 1994. http://dx.doi.org/10.3347/kjp.1991.29.4.325
Copyright © 1991 by The Korean Society for Parasitology


Epidemiological studies of digenetic trematodes in Yongyang County, Kyungpook Province
D I Chung,Y I Kim,^K R Lee,^ and D W Choi
Department of Parasitology, Kyungpook National University School of Medicine, Taegu, Korea.


Abstract
The present study was undertaken to determine the endemicity of trematode infections in Yongyang County, Kyungpook Province, Korea. One hundred and seventy-seven out of 955 residents examined were found to be infected with one or more kinds of helminths. The prevalence rate was 18.5%. Among them, 70 were found to be infected with Clonorchis sinensis, 74 with Metagonimus sp. and 24 with both flukes. The eggs of Fasciolidae were demonstrated from two specimens. The prevalence rate of clonorchiasis in males was 12.6%, while that in females was 3.6% (p < 0.05). The prevalence of metagonimiasis in males was 12.0% and was also significantly higher than 6.1% in females (p < 0.05). The intensity of both infections was significantly heavier in males than in females. The prevalence of both flukes was higher in residents of over 30 years of age than in those below that age. No correlation was found between the intensity and the age group. Among eight species of the fresh-water fish collected at the Panbyon River, Zacco temmincki was found to be the most frequently and heavily infested with metacercariae of Metagonimus sp., and Gnathopogon atromaculatus alone was found to be infested with metacercariae of Clonorchis sinensis. The present results suggest that Yongyang area still remains endemic with Clonorchis sinensis and Metagonimus sp. infection.

Figures


	Fig. 1 Map of Yongyang County, Kyungpook Province, showing the river Panbyon and its tributaries.


	Fig. 2 Intensity of infection with C. sinensis by sex and age groups.


	Fig. 3 Intensity of infection with Metagonimus sp. by sex age groups.


	Fig. 4 Association of intensity of C. sinensis infection in residents with infestation of fish host by area.


	Fig. 5 Association of intensity of Metagonimus sp. infection in residents with infestation of fish host by area.


	Fig. 6 Relationships between EpG count by Stoll's method and count by a modified method.

Tables


	Table 1 Prevalence of helminthic infection among 955 residents of Yongyang county, Kyungpook Province, Korea(1990)


	Table 2 Prevalence of Clonorchis sinensis infection in Yongyang county by sex and age groups(1990)


	Table 3 Prevalence of Metagonimus sp. infection in Yongyang county by sex and age groups(1990)


	Table 4 Sex and age groups related to intensity of infection with C. sinensis based on Stoll's egg counting method among residents(1990)


	Table 5 Sex and age groups related to intensity of infection with Metagonimus sp. based on Stoll's egg counting method among residents(1990)


	Table 6 Distribution of intensity of infection with C. sinensis among residents by sex and age groups


	Table 7 Distribution of intensity of infection with Metagonimus sp. among residents by sex and age groups


	Table 8 Prevalence and intensity of infection with C. sinensis according to administrative districts of Yongyang county(1990)


	Table 9 Prevalence and intensity of infection with Metagonimus sp. according to administrative districts of Yongyang county(1990)


	Table 10 Fresh water fish collected in the Panbyon river, Yongyang County(1990)


	Table 11 Incidence and intensity of infestation with C. sinensis and Metagonimus sp. metacercariae in fresh-water fish collected in the river Panbyon(1990)


	Table 12 Rate and intensity of infestation with C. sinensis metacercariae from G. atromaculatus by locality


	Table 13 Rate and intensity of infestation with Metagonimus sp. metacercariae from Z. temmincki by locality

References


1.	Ahn YK. [Epidemiological studies on Metagonimus yokogawai infection in Samcheok-gun, Kangwon-do, Korea]. Korean J Parasitol 1984;22(2):161–170.

2.	Bae KH, Ahn YK, Soh CT, Tsutsumi H. [Epidemiological Studies On Clonorchis Sinensis Infection Along The Nam-River In Gyeongnam Province, Korea]. Korean J Parasitol 1983;21(2):167–186.

3.	Cho WH, et al. Keimyung Univ Med J 1984;3:243–247.

4.	Choi DW. Prevalence of Clonorchis sinensis in vicinity of Seongju, Kyungpook Province, Korea. Korean J Parasitol 1978;16(2):140–147.

5.	Choi DW, Ahn DH, Choy CH, Kim SS. Clonorchis Sinensis In Kyungpook Province, Korea: 3. Changing Pattern Of Clonorchis Sinensis Infection Among Inhabitants. Korean J Parasitol 1976;14(2):117–122.

6.	Choi DW, et al. Kyungpook Univ Med J 1990;31:32–38.

7.	Choi DW, et al. Kyungpook Univ Med J 1990;31:17–25.

8.	Choi DW, et al. Kyungpook Univ Med J 1988;29:16–22.

9.	Choi JJ. J Busan Med Coll 1977;17:79–89.

*10.*	Hwang JT, et al. Kyungpook Univ Med J 1980;21:460–475.

*11.*	Hwang WK. J Busan Med Coll 1979;16:1–9.

*12.*	Joo CY. Epidemiological studies of Clonorchis sinensis in vicinity of river Taewha, Kyungnam province, Korea. Korean J Parasitol 1980;18(2):199–214.

*13.*	Kang JW, et al. Keimyung Univ Med J 1984;3:146–150.

*14.*	Kim CH. [Study on the Metagonimus sp. in Gum river basin, Chungchung-nam Do, Korea]. Korean J Parasitol 1980;18(2):215–228.

*15.*	Kim CH, Park CH, Kim HJ, Chun HB, Min HK, Koh TY, Soh CT. [Prevalence Of Intestinal Parasites In Korea]. Korean J Parasitol 1971;9(1):25–38.

*16.*	Komiya Y, et al. J Shanghai Sci Insti 1941;5:69–106.

*17.*	Lee SH, Hwang SW, Chai JY, Seo BS. Comparative Morphology Of Eggs Of Heterophyids And Clonorchis Sinensis Causing Human Infections In Korea. Korean J Parasitol 1984;22(2):171–180.

*18.*	Ritchie LS. An ether sedimentation technique for routine stool examinations. Bull U S Army Med Dep 1948;8(4):326.

*19.*	Seo BS, Lee SH, Cho SY, Chai JY, Hong ST, Han IS, Sohn JS, Cho BH, Ahn SR, Lee SK, Chung SC, Kang KS, Shim HS, Hwang IS. An Epidemiologic Study On Clonorchiasis And Metagonimiasis In Riverside Areas In Korea. Korean J Parasitol 1981;19(2):137–150.

*20.*	Seo BS, Rim HJ, Loh IK, Lee SH, Cho SY, Park SC, Bae JW, Kim JH, Lee JS, Koo BY, Kim KS. [Study On The Status Of Helminthic Infections In Koreans]. Korean J Parasitol 1969;7(1):53–70.

*21.*	Shin DS. [Epidemiological studies of Clonorchis sinensis prevailed in the peoples of Kyungpook Province]. Korean J Parasitol 1964;2(1):1–13.

*22.*	Sohn JS, et al. Kyungpook Univ Med J 1987;28:81–85.

*23.*	Song SB. Epidemiological studies of Clonorchis sinensis in lower area of Nag Dong river nearby Busan City in Korea. Korean J Parasitol 1982;20(2):133–141.

*24.*	Stoll NR. Am J Hyg 1923;3:59–70.