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Echinostome Flukes Receovered from Humans in Khammouane Province, Lao PDR
Jong-Yil Chai,Woon-Mok Sohn,Tai-Soon Yong,Keeseon S. Eom,Duk-Young Min,Eui-Hyug Hoang,Bounlay Phammasack,Bounnaloth Insisiengmay,Han-Jong Rim 대한기생충학열대의학회 2012 The Korean Journal of Parasitology Vol.50 No.3
Echinostome eggs were detected in 22 (1.1%) of 2,074 people residing in riparian villages along the Mekong River in Khammouane Province, Lao PDR. In order to recover the adult flukes, 9 persons were treated with praziquantel and purged with magnesium salts. A total of 55 echinostome specimens (4 species) were recovered from the 9 persons. Echinostoma revolutum (8 specimens) was recovered from 3 persons, Artyfechinostomum malayanum (8 specimens) was from 2 persons, Echinochasmus japonicus (33 specimens) was from 7 persons, and Euparyphium sp. (6 specimens) was from 1 person. In Lao PDR, only human infections with E. japonicus were previously known. Therefore, the present study describes human infections with E. revolutum, A. malayanum, and Euparyphium sp. for the first time in Lao PDR. These results indicate that the surveyed villages of Khammouane Province, Lao PDR are low-grade endemic foci of echinostomiasis.
Echinostoma ilocanum Infection in Two Residents of Savannakhet Province, Lao PDR
Jong-Yil Chai,Woon-Mok Sohn,Jaeeun Cho,Keeseon S. Eom,Tai-Soon Yong,Duk-Young Min,Eui-Hyug Hoang,Bounlay Phommasack,Bounnaloth Insisiengmay,Han-Jong Rim 대한기생충학열대의학회 2018 The Korean Journal of Parasitology Vol.56 No.1
Adult specimens of Echinostoma ilocanum (Garrison, 1908) Odhner, 1911 (Trematoda: Echinostomatidae) were recovered from 2 riparian people who resided along the Mekong River in Savannakhet Province, Lao PDR. In fecal examinations done by the Kato-Katz technique, they revealed echinostome eggs together with eggs of Opisthorchis viverrini (and minute intestinal fluke eggs) and hookworms. To recover the adult flukes, they were treated with praziquantel 30-40 mg/kg in a single dose and purged with magnesium salts. A total of 658 adult fluke specimens were recovered from the 2 people; 456 from case 1 and 202 from case 2. Specimens from case 1 consisted of 335 echinostomes (301 E. ilocanum and 34 species undetermined), 120 O. viverrini, and 1 Haplorchis taichui, and those from case 2 consisted of 36 E. ilocanum, 134 O. viverrini, and 32 H. taichui. Thus, the number of E. ilocanum specimens was 337 in total (average per person, 168.5). From this study, it is suggested that foodborne intestinal flukes and liver flukes are highly prevalent along the Mekong River in Savannakhet Province. The present report describes for the first time human infections with E. ilocanum in Lao PDR.
Taehee Chang,Bong-Kwang Jung,Hyemi Song,Jaeeun Cho,Sooji Hong,Keon-Hoon Lee,Eui-Hyug Hoang,Jisu Kang,Jini Lim,Hana Lee,Jong-Yil Chai 대한기생충학열대의학회 2019 The Korean Journal of Parasitology Vol.57 No.6
Gymnophalloides seoi (Digenea: Gymnophallidae) is a human intestinal trematode contracted by eating raw oysters (Crassostrea gigas) in the Republic of Korea (=Korea). It has been known to be highly endemic in Aphae Island, Shinan-gun, Jeollanam-do (Province). However, recent epidemiological status of G. seoi has not been reported since the 1990s. In this study, we investigated the prevalence of G. seoi metacercariae in natural and cultured oysters collected from 3 islands and 2 coastal areas in western parts of Korea. The oysters were examined using the artificial digestion method followed by stereomicroscopy. The overall positive rate of G. seoi metacercariae in natural oysters was 66.0% (99/150), and the oysters collected from Yubu Island showed the highest infection rate (74.0%). However, the metacercarial density per oyster was relatively low (1.5-2.4 per oyster). By contrast, no metacercaria was found in cultured oysters purchased from 2 coastal areas in Chungcheongnam-do. Thus, we could confirm that natural oysters produced from 3 western coastal islands are infected with G. seoi metacercariae, whereas cultured oysters purchased from 2 coastal areas were free from infection.
Fishborne Trematode Metacercariae in Luang Prabang, Khammouane, and Saravane Province, Lao PDR
Han-Jong Rim,Woon-Mok Sohn,Tai-Soon Yong,Keeseon S. Eom,Jong-Yil Chai,Duk-Young Min,Soon-Hyung Lee,Eui-Hyug Hoang,Bounlay Phommasack,Sithat Insisiengmay 대한기생충학열대의학회 2013 The Korean Journal of Parasitology Vol.51 No.1