Epidemiological study of clonorchiasis and metagonimiasis along the Geum-gang (River) in Okcheon-gun (County), Korea

Lee, Gye-Sung; Cho, Insung; Lee, Young-Ha; Noh, Hyung-Jun; Shin, Dong–Min; Lee, Sok-Goo; Lee, Tae-Yong

doi:10.3347/kjp.2002.40.1.9

Cited by 24 publications

(26 citation statements)

References 10 publications

(33 reference statements)

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“…This decreasing phenomenon in senior groups may suggest the possibility of shorter life span of residents with clonorchiasis than that of uninfected ones at the endemic areas [10]. Our data updated recent status of clonorchiasis in endemic areas of Korea as reduced egg positive rate and lower intensity of infection compared with those of previous reports [4,9,11,12]. Whole and age-specific egg positive rates have decreased, and the age-specific peak moves to 60s from 40s or 50s.…”

Section: Discussionsupporting

confidence: 86%

Prevalence of Clonorchiasis in Southern Endemic Areas of Korea in 2006

Cho

Lee

et al. 2008

Korean J Parasitol

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Abstract:This study was performed to investigate prevalence of clonorchiasis among the inhabitants living in villages along the 4 major rivers, Nakdong-gang (= river), Seomjin-gang, Youngsan-gang, and Guem-gang in southern Korea. From January to December 2006, a total of 24,075 stool samples (1 sample per an inhabitant) were collected in 23 localities and examined by the formalin-ether sedimentation technique. Of the inhabitants examined, 3,441 (14.3%) were found to harbor various types of intestinal parasite eggs, cysts or larvae. Numbers of infected people were 2,661 (11.1%) for Clonorchis sinensis, 431 (1.8%) for heterophyids, 226 (0.9%) for Entamoeba spp., 57 (0.2%) for Giardia lamblia, 30 (0.1%) for Trichuris trichiura, and 18 (0.07%) for echinostomes. Prevalence rates of clonorchiasis according to the river basin were 17.1% in Nakdong-gang, 11.2% in Seomjin-gang, 5.5% in Youngsan-gang and 4.6% in Guem-gang. Of the 2,661 C. sinensis egg-positive cases, 57.7% was male. The present findings suggest that clonorchiasis is still highly prevalent among inhabitants in the riverside areas of southern Korea, and it is necessary to implement a systematic control program in the endemic areas.

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Section: Discussionsupporting

confidence: 86%

Prevalence of Clonorchiasis in Southern Endemic Areas of Korea in 2006

Cho

Lee

et al. 2008

Korean J Parasitol

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“…[19,21,22] A few studies covered areas <1 km away from the river or its branch. [20] However, measuring the prevalence rate of the entire sample area that covers all branch streams is critical in a region where over 2/3 of its areas are within 5 km or less away from the main river (Fig. 2) and where most of its areas are <1 km or less away from the riverside areas or branch streams, as in the case of Okcheon-gun (Fig.…”

Section: Discussionmentioning

confidence: 99%

A new method for estimating the prevalence of clonorchiasis in Korea

Jeong¹,

Lee

Chung

et al. 2017

Medicine

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South Korea presently uses an arbitrary sampling method to monitor the prevalence of Clonorchis sinensis infection in the endemic areas of the country. However, the present method is not standardized and focuses primarily on individuals who reside nearest to the mainstream river. We propose a new sampling method that combines cluster sampling with proportionate quota sampling to ensure that the entire endemic area is accurately represented. We tested the new method in Okcheon-gun, South Korea, and determined that the C sinensis infection prevalence (8.9%) in 2013 was higher than that (6.9%) estimated in 2012 when the arbitrary method was used. Additionally, no difference was observed in the prevalence based on the distance from the riverside areas, including branches and creeks, between the areas <1 and >1 km away from the riversides. Therefore, health authorities should place equal emphasis on all regions within the endemic areas. Based on the findings, we recommend the following: the clonorchiasis prevalence rate must be measured using probability sampling, (clear guidelines on survey coverage should be provided to include the riverside areas and all areas nearby branch streams, and regional cohorts should be created for continuous monitoring of prevalence rates across the region.

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“…130,000 infected people (Ministry of Health and Social Welfare, and Korea Association of Health, 1997). Human infection with the three Metagonimus (Digenea: Heterophyidae) species is due to eating of raw fishes (intermediate hosts), and is regarded as a parasitic disease of importance to public health in the riverside areas of the southern and eastern coasts of Korea (Yu et al, 1994;Chai et al, 2000b;Lee et al, 2002). Three species of the genus Metagonimus are known in Korea (Chai et al, 1991): M. yokogawai (Katsurada, 1912), M. takahashii (Suzuki, 1930), and M. miyatai (Miyata, 1941(Miyata, , 1944Saito et al, 1984Saito et al, , 1997.…”

Section: Introductionmentioning

confidence: 99%

“…*Corresponding author (e-mail: shuh@hallym.ac.kr) 1996), different geographical distributions (Kim et al, 1987;Chai et al, 1993;Yu et al, 1994;Lee et al, 2002). In addition, they have different polymerase chain reaction-based restriction fragment length polymorphism (PCR-RFLP) patterns and random amplified polymorphic DNA (RAPD) patterns (Yu et al, 1997a(Yu et al, , 1997b, and simple sequence repeat anchored polymerase chain reaction (SSR-PCR) patterns of genomic DNA of ribosomal RNA and mitochondrial cytochrome c oxidase 1 (mtCOI) gene (Yang et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Sequence comparisons of 28S ribosomal DNA and mitochondrial cytochrome c oxidase subunit I of Metagonimus yokogawai, M. takahashii and M. miyatai

et al. 2004

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Abstract:We compared the DNA sequences of the genus Metagonimus: M. yokogawai, M. takahashii, and M. miyatai. We obtained 28S D1 ribosomal DNA (rDNA) and mitochondrial cytochrome c oxidase subunit I (mtCOI) fragments from the adult worms by PCR, that were cloned and sequenced. Phylogenetic relationships inferred from the nucleotide sequences of the 28S D1 rDNA and mtCOI gene. M. takahashii and M. yokogawai are placed in the same clade supported by DNA sequence and phylogenic tree analysis in 28S D1 rDNA and mtCOI gene region. The above findings tell us that M. takahashii is closer to M. yokogawai than to M. miyatai genetically. This phylogenetic data also support the nomination of M. miyatai as a separate species.

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Epidemiological study of clonorchiasis and metagonimiasis along the Geum-gang (River) in Okcheon-gun (County), Korea

Cited by 24 publications

References 10 publications

Prevalence of Clonorchiasis in Southern Endemic Areas of Korea in 2006

Prevalence of Clonorchiasis in Southern Endemic Areas of Korea in 2006

A new method for estimating the prevalence of clonorchiasis in Korea

Sequence comparisons of 28S ribosomal DNA and mitochondrial cytochrome c oxidase subunit I of Metagonimus yokogawai, M. takahashii and M. miyatai

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