Intestinal trematode infections in the villagers in Koje-myon, Kochang-gun, Kyongsangnam-do, Korea

Son, Woo-Young; Huh, Sun Young; Lee, Soo-Ung; Woo, Ho-Choon; Hong, Sung-Jong

doi:10.3347/kjp.1994.32.3.149

Cited by 25 publications

(11 citation statements)

References 12 publications

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“…Among them, E. hortense is the dominant species and has 8 fish intermediate hosts, i.e., Misgurnus anguillicaudatus , Misgurnus mizolepis , R. oxycephalus , Odontobutis interrupta , S. japonicus coreanus , Rhinogobius brunneus , A. macropterus , and Acanthogobius flavimanus , whereas the remaining 2 species take snails as the second intermediate hosts [5]. Moreover, some inland areas, i.e., Eumseong-gun (Chungcheongbuk-do), Yeongwol-gun (Gangwon-do), Cheongsong-gun (Gyeongsangbuk-do), and Geochang-gun (Gyeongsangnam-do), have been reported as the endemic foci of E. hortense infection [20,34,35,36]. Therefore, the metacercariae of Echinostoma spp.…”

Section: Discussionmentioning

confidence: 99%

Prevalence of Zoonotic Trematode Metacercariae in Freshwater Fish from Gangwon-do, Korea

et al. 2014

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The infection status of zoonotic trematode metacercariae was investigated in a total of 2,293 freshwater fish collected from 11 rivers or streams in 9 administrative regions of Gangwon-do, Korea for 5 years (2009-2013). All fish were collected by netting methods and examined using the artificial digestion methods. Clonorchis sinensis metacercariae were detected in 4 fish species, i.e., Pungtungia herzi, Squalidus japonicus coreanus, Acheilognathus rhombeus, and Ladislabia taczanowskii, from only Hantangang in Cheorwon-gun. Metagonimus spp. metacercariae were found in 1,154 (50.3%) fish and their average number per infected fish was 55.8. Among the positive fish species, especially Tribolodon hakonensis from Namdaecheon in Yangyang-gun and Plecoglossus altivelis from Osipcheon in Samcheok-si were most heavily infected. Centrocestus armatus metacercariae were detected in 611 (26.7%) fish and the average metacercarial burden per infected fish was 1,032. Two chub species, Zacco platypus and Zacco temminckii were highly and heavily infected with C. armatus metacercariae in almost all regions surveyed. Echinostoma spp. metacercariae were also found in 24 fish from a few localities, but their numbers per fish infected were very low. From the above results, it is confirmed that the metacercariae of intestinal flukes, especially Metagonimus spp. and C. armatus, were heavily infected, while C. sinensis metacercariae were rarely found in fish from Gangwon-do, Korea.

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Section: Discussionmentioning

confidence: 99%

Prevalence of Zoonotic Trematode Metacercariae in Freshwater Fish from Gangwon-do, Korea

et al. 2014

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“…This fluke was also found in China [7] and Vietnam [8,9]. Human infections with this fluke were first reported in Japan and then in Korea [10,11,12,13,14,15,16]. This human intestinal fluke is morphologically characterized by a head crown with 37-38 collar spines including 5 end group ones on each side, and abnormal location and/or disappearance of testis [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…In the genus Echinostoma , more than 7 species are known to be zoonotic, i.e., E. angustitestis , E. cinetorchis , E. ehinatum , E. hortense , E. ilocanum , E. macrorchis , and E. revolutum [1]. Among them, Echinostoma hortense is the predominant species with several endemic foci in Korea [15,16,21,22,23]. Clinical cases of E. hortense infection have been sporadically diagnosed by the recovery of adult worms in gastroduodenal endoscopy [24,25,26,27,28].…”

Section: Introductionmentioning

confidence: 99%

A Case of Echinostoma cinetorchis (Trematoda: Echinostomatidae) Infection Diagnosed by Colonoscopy

et al. 2014

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Human cases of echinostomiasis have been sporadically diagnosed by extracting worms in the endoscopy in Korea and Japan. Most of these were caused by Echinostoma hortense infection. However, in the present study, we detected 2 live worms of Echinostoma cinetorchis in the ascending colon of a Korean man (68-year old) admitted to the Gyeongsang National University Hospital with complaint of intermittent right lower quadrant abdominal pain for 5 days. Under colonoscopy, 1 worm was found attached on the edematous and hyperemic mucosal surface of the proximal ascending colon and the other was detected on the mid-ascending colon. Both worms were removed from the mucosal surface with a grasping forceps, and morphologically identified as E. cinetorchis by the characteristic head crown with total 37 collar spines including 5 end-group ones on both sides, disappearance of testes, and eggs of 108×60 µm with abopercular wrinkles. The infection source of this case seems to be the raw frogs eaten 2 months ago. This is the first case of endoscopy-diagnosed E. cinetorchis infection in Korea.

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“…Concerning the EPDPW of trematodes, for example, Metagonimus yokogawai, which belongs to the same Heterophyidae family as H. taichui, was 280 [11]. The EPDPW of Echinostoma hortense ranged from 1,478 [12] to 3,882 [13], and the EPDPW of Pharyngostomum cordatum was 1,000 [14]. The EPDPW of O. viverrini was estimated to be 1,000-2,500 [15].…”

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confidence: 99%

Egg Laying Capacity of Haplorchis taichui (Digenea: Heterophyidae) in Humans

et al. 2009

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Haplorchis taichui, a minute intestinal fluke, is a digenean trematode widespread in Southeast Asian countries [1,2]. Metacercariae, the infective stage of the parasite, have been found in many species of freshwater fish [3][4][5]. Infection in humans occurs by eating infected fish in raw or undercooked condition. Infection with H. taichui is mostly asymptomatic unless heavily infected, therefore, haplorchiasis has been considered to be less important in public health view points. However, the precise status of H. taichui infection in humans has never been explored in detail even in heavy endemic areas.In general, the number of eggs per gram of feces (EPG) is important to speculate the worm burden and intensity of the infection, and also is an indicator to evaluate the efficacy of anthelmintic drugs and thereby to design control programs. Herein, the number of eggs per day per worm (EPDPW) of H. taichui was estimated by the EPG and the number of discharged adult worms from individual participants. In addition, the correlation of the EPG and the worm burden was examined.With the approval of the ethical committee of the Faculty of Tropical Medicine, Mahidol University (MUTM 2006-040), fecal egg examinations by the modified cellophane thick smear method were performed for 520 villagers of Ban Luang district, Nan province, north Thailand in September 2006. Fecal samples were examined by the modified cellophane thick smear method [6]. The kit used was manufactured by Department of Helminthology, Faculty of Tropical Medicine, Mahidol University. Approximately a 27.4 mg fecal sample was used for each specimen, and then the EPG was calculated by multiplying the number of eggs per slide with 37. The same fecal samples were examined also by the modified formalin detergent (mFD) method [7] to compare the sensitivity of the 2 methods. As shown in Fig. 1, the egg counts by 2 methods were correlated well with each other (P = 0.008). However, the sensitivity of the modified cellophane thick smear method was higher than the formalin method (ttest; P < 0.01). Therefore, the EPG data of the cellophane thick smear method were used for further analyses in this study.Approximately 70% of the villagers were found to be parasite-egg positive by fecal examination. All egg-positive villagers were treated with praziquantel (Opticide-FC, Medicpharma Co., Bangkok, Thailand) 40 mg/kg. Among those small trematode egg-positives, 25 villagers agreed to submit their whole stool samples after the treatment. To those participants, 60 ml of saturated magnesium sulfate solution was given as the purgative 1 hr after the drug administration. The expelled worms were collected, brought back to the laboratory, identified and counted under a stereomicroscope. The number of eggs per day (EPD) was calculated by the EPG multiplied by the average daily fecal weight Egg Laying Capacity of Haplorchis taichui (Digenea: Heterophyidae) in HumansKorean J Parasitol. Vol. 47, No. 3: 315-318, September 2009 DOI: 10.3347/kjp.2009 315Megumi Sato, Surapol Sanguankiat, S...

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Intestinal trematode infections in the villagers in Koje-myon, Kochang-gun, Kyongsangnam-do, Korea

Cited by 25 publications

References 12 publications

Prevalence of Zoonotic Trematode Metacercariae in Freshwater Fish from Gangwon-do, Korea

Prevalence of Zoonotic Trematode Metacercariae in Freshwater Fish from Gangwon-do, Korea

A Case of Echinostoma cinetorchis (Trematoda: Echinostomatidae) Infection Diagnosed by Colonoscopy

Egg Laying Capacity of Haplorchis taichui (Digenea: Heterophyidae) in Humans

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